which of the following can be trend lines on a graph? a. curved lines or strait b. only curved lines c. only strait lines

Answers

Answer 1
Answer:

A trend line is a line that indicates the tendency of a graph; in other words, is the line that shows the apparently direction of a group of points on a graph. There are various types of trend lines; let’s check them:

Linear

Linear trend lines are used when the points on your graph follow a straight line pattern, which means that something is increasing or decreasing at a fixed rate (the slope of the straight line).

Logarithmic

Logarithmic trend lines are curved lines used when the rate of change increases very quickly and then settles down.

Polynomial

Polynomial trend lines are curved lines used when the data oscillates (change in direction from increasing to decreasing or vice versa).

Power

Power trend lines are curved lines used when you have a positive set of data that increases at a specific rate.

Exponential

Exponential trend lines are curved lines used when you have a set of data that increase or decreases at increasingly or decreasingly higher rates.

Moving averages

Moving averages are used when your data that varies a lot. They can be straight lines, curved lines or a combination of both.

As you can see, all trend lines are either straight lines or curved lines; therefore, the correct answer is a. curved lines or straight lines

Answer 2
Answer: A is the correct answer I took the test

Related Questions

A used book store about $500 dollars worth of books they sold the books for $1,200 making $7.00 per book how many books were involved
The amount of water in a bottle is reduced by 85% to 120 ml. How much water was originally in the bottle?
Round 32.697 to the nearest tenth
80% of the doctors surveyed believed exercising 30 minutes a day can help you live a healthier life. If 240 doctors believe in exercising, how many doctors were surveyed?
Find the average rate of change from x = 7 to x = 14 for the function f(x) = 0.01(2)^x and select the correct answer below. 23.22 35.84 128 163.84

What is the median 7,11,10,13,17,23,25,25,20,18,12,9

Answers

the median is 24 because u have two 23 and 25 u add it  then divide by 2
the answer will be 15.

What is 40 percent as a decimal?

Answers

Your answer= .4
To change 40% into a fraction, you have to move the decimal two spots to the left. If you are turning a decimal into a percent, you would move the decimal two spots to the right.

Answer:

\Large \boxed{0.4}

Step-by-step explanation:

To write a percent for a decimal, move the decimal point two places to the right. Add the percent sign.

First, divide by 100.

40/100=0.4

Therefore, the correct answer is 0.4.

HELP!!! Using a directrix of y = 2 and a focus of (3, −4), what quadratic function is created?

Answers

Answer:

The required quadratic function is y=-(1)/(12)(x-3)^2-1.

Step-by-step explanation:

The standard form of the parabola is

(x-h)^2=4p(y-k)

Where the focus is (h, k + p) and the directrix is y = k - p.

The directrix of y = 2 and a focus of (3, −4).

(h,k+p)=(3,-4)

On comparing both sides we get

h=3

k+p=-4                           ...... (1)

y=k-p

k-p=2                           ...... (2)

Add equation (1) and (2).

2k=-2

k=-1

Substitute k=-1 in equation (1).

(-1)+p=-4

p=-3

Therefore the equation of parabola is

(x-3)^2=4(-3)(y-(-1))

(x-3)^2=-12(y+1)

It can be rewritten as

y=-(1)/(12)(x-3)^2-1

Therefore the required quadratic function is y=-(1)/(12)(x-3)^2-1.

parabola with vertx (3,-1) that opens down

4(-3)(y+1)=(x-3)^2
y+1=(-1/12)(x-3)^2
y=(-1/12)(x-3)^2-1

Please answer :( They are fractions and I suck at them.

Answers

Answer:

8/15 (fraction) or 0.5333333333333...

Step-by-step explanation:

Answer:

4/15

Step-by-step explanation:

115×41=?

For fraction multiplication, multiply the numerators and then multiply the denominators to get

1×415×1=415

This fraction cannot be reduced.

Therefore:

115×41=415

Apply the fractions formula for multiplication, to

115×41

and solve

1×415×1

=415

Jill Barkely obtained a 25-year, $460,000 mortgage loan from University Savings and Loan Association with 6% interest. The monthly payment is $2,962.40. For the first payment, find the interest to the nearest cent.

Answers

Have you considered calculating it directly? $2,962.40*(0.06/12)
If you do that then your answer would be 14.81...
Hope this helps...  :)

. For vectors B⃗ =−iˆ−4jˆB→=−i^−4j^ and A⃗ =−3iˆ−2jˆA→=−3i^−2j^ , calculate (a) A⃗ +B⃗ A→+B→ and its magnitude and direction angle, and (b) A⃗ −B⃗ A→−B→ and its magnitude and direction angle.

Answers

(a) A + B: The result is -4i - 6j, with a magnitude of 2√13 and a direction angle of arctan(3/2).

(b) A - B: The result is -2i + 6j, with a magnitude of 2√10 and a direction angle of arctan(-3).

The given vectors are:

B = -i - 4j

A = -3i - 2j

(a) A + B:

To add two vectors,

Simply add their corresponding components.

So, A + B = (-3i - 2j) + (-i - 4j)

Combining the i-components, we get:

-3i - i = -4i.

And combining the j-components, we get:

-2j - 4j = -6j.

Therefore, A + B = -4i - 6j.

To find the magnitude of A + B,

Use the Pythagorean theorem:

|A + B| = √((x^2 + y^2)),

Where x is the magnitude of the i-component and y is the magnitude of the j-component.

In this case,

x = -4 and y = -6,

So: |A + B| = √((-4)^2 + (-6)^2)

|A + B| = 2√13

To find the direction angle of A + B,

Use the arctan function:

θ = arctan(y / x),

Where y is the j-component and x is the i-component.

In this case,

x = -4 and y = -6,

so: θ = arctan(-6 / -4)

θ = arctan(3/2)

Therefore, the magnitude of A + B is 2√13 and the direction angle is arctan(3/2).

(b) A - B:

To subtract two vectors,

Subtract their corresponding components.

So, A - B = (-3i - 2j) - (-i - 4j).

Combining the i-components, we get:

-3i + i = -2i.

And combining the j-components, we get:

-2j - (-4j) = 2j + 4j = 6j.

Therefore, A - B = -2i + 6j.

To find the magnitude of A - B,

Use the Pythagorean theorem:

|A - B| = √((x^2 + y^2)),

Where x is the magnitude of the i-component and y is the magnitude of the j-component.

In this case,

x = -2 and y = 6,

so: |A - B| = √((-2)^2 + 6^2)

|A - B| = 2√10

To find the direction angle of A - B,

Use the arctan function:

θ = arctan(y / x),

Where y is the j-component and x is the i-component.

In this case, x = -2 and y = 6,

so:

θ = arctan(6 / -2)

θ = arctan(-3)

Therefore,

The magnitude of A - B is 2√10 and the direction angle is arctan(-3).

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The complete question is:

For vectors B =−i −4j  and A =−3i −2j ,

Calculate (a) A + B and its magnitude and direction angle, and (b) A − B and its magnitude and direction angle.

The resulting vectors after adding and subtracting vectors A and B are A + B = -4i - 6j with a magnitude of 7.21 and A - B = -2i + 2j with a magnitude of 2.83. The direction angle for the vectors are calculated using arctan of the absolute value of the components' ratios.

For vectors B = -i - 4j and A = -3i - 2j, you first need to add and subtract these vectors component-wise to get the resulting vectors. Addition gives A + B = -i + (-3i) + -4j + (-2j) = -4i - 6j, whereas subtraction gives A - B = -3i - (-i) + -2j - (-4j) = -2i + 2j.

The magnitude of a vector is calculated by the Pythagorean theorem: (magnitude of A+B) = sqrt((-4)^2 + (-6)^2) = 7.21 and (magnitude of A-B) = sqrt((-2)^2 + 2^2) = 2.83.

The direction angle is found using arctan(|Ay / Ax|), but adjustment must be made depending on the quadrant of the resulting vector. In conclusion, (a) A + B = -4i - 6j, |A + B| = 7.21, angle = arctan(6/4), and (b) A - B = -2i + 2j, |A - B|= 2.83, angle = arctan(2/2).

Learn more about Vectors here:

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