MATHEMATICS HIGH SCHOOL

08.04A)The scatter plot below shows the test scores of a group of students who played games online for different amounts of time in a day:What will most likely be the effect on the test score of a student if the number of hours he/she plays games online increases?

Test score will decrease because the graph shows negative association

Test score will increase because the graph shows positive association

Test score will increase because the graph shows negative association

Test score will decrease because the graph shows positive association

4 graphs are shown:

Which graph represents a positive nonlinear association between x and y?

Graph A

Graph B

Graph C

Graph D

Answers

Answer 1

Answer:

Answer:

Test score will decrease because the graph shows negative association.

Graph A

Step-by-step explanation:

Clearly from the graph we could observe from the scatter plot that:

Test score will decrease because the graph shows negative association.

( As the points or the test scores are decreasing with the increasing number of hours spent on playing games online)

Positive Nonlinear association:

A positive Non-linear relationship between two variables can be shown with an upward-sloping curve in a graph.

Hence, Graph A represents the following relationship.

( Since graph B and D are linear and graph C is negative association since the value keeps on decreasing)

Answer 2

Answer: Part 1 : The scatter plot below shows the test scores of a group of students who played games online for different amounts of time in a day:What will most likely be the effect on the test score of a student if the number of hours he/she plays games online increases?

Test score will decrease because the graph shows negative association

Test score will increase because the graph shows positive association

Test score will increase because the graph shows negative association

Test score will decrease because the graph shows positive association

The correct answer is : Test score will decrease because the graph shows negative association.

Fact : Playing video games is a distraction and many kids fail there grade. Therefore test scores will decrease.

Part 2 : Non Linear: This can be defined as if all the points on the scatter diagram tends to lie near a smooth curve, the correlation is said to be non linear.

Answer = Diagram C

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Sam created a porch that was part wooden and part concrete, as shown in the figure below.Note: Figure not drawn to scale If a = 18 ft, b = 24 ft, and c = 30 ft, what is the total area of the porch? Assume that the wooden part is a right triangle and the concrete part is a square. A. 186 ft2 B. 102 ft2 C. 1,260 ft2 D. 1,116 ft2
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Triangle RST is the pre-image of triangle UVW with a scale factor of 3. Find the area of triangle UVW if the area of triangle RST is 9 cm2. a.) Set up an equation on how to solve for the missing area using the Area Ratios for Similar Figures.

b.) What is the area of triangle UVW?

Answers

A. (Area of triangle UVW)/(Area of triangle RST)=3^2=9
B. Substitute Area of triangle RST=9 into the equation above.

(Area of triangle UVW)/9=9
Area of triangle UVW =9x9=81 cm^2

How might you prove your observations in Question 2 using algebra and x and y-coordinates? Briefly outline an approach using what you know about a midpoint and the slope of a line.

Answers

Answer:

I can use variables to represent the coordinates of the vertices for a general triangle, ∆ABC. Then I can calculate the midpoints of the sides in terms of those variables. Using the point-slope formula for the equation of a straight line, I can build the symbolic equations for the three medians, AE, BF, and CD. I can solve for the point of intersection for two of the medians, AE and BF, for example. Finally, I can prove the lines (i.e., medians) concurrent if the point I found also satisfies the equation of the line for CD.

Step-by-step explanation:

Here is the answer from Plato! Hope this helps :)

Answer:

7a-3=3-2a
I don't know how to solve this question

Answers

7a-3=3-2a
9a-3=3 (add 2a to both sides)
9a=6 (add 3 to both sides)
a=6/9 (divide by 9 to both sides)

get all variables (in this case, "a") on one side by adding "2a" to both. this cancels the "-2a". then, combine like terms. also move "-3" to the other side, by adding "3". finally, divide the "6" and "a" by "9" to get variable alone. therefore, "a = 2/3".
7a-3=3-2a
+2a +2a
9a-3=3
+3 +3
9a=6
a=2/3

the ratio of red marbles to blue marbles in a bag is 4:7. There are 16 red marbles.How many blue marbles are there? solve for indicated variable.