1.Find the constant of variation for the relationship f(x)= 30x.  A.10  B.30  C.x  D.f(x)
2.Find the constant of variation for the relationship shown in the following table:
x 1 2  3 4
y 4  8 12 16

A.1  B.2  C.3  D.4

3.If f(x) varies directly with x, and f(x) = 8 when x = 6, write the direct linear variation equation.  A. f(x) = x  B.f(x) = 6x  C.f(x) = 8x  D.f(x) = x

4.If f(x) varies directly with x, and f(x) = 56 when x = 8, find the value of f(x) when x = 2
A.4  B.7  C.8  D.14

5.Which does not show a direct variation between x and y?
A.y =   B.y = 2x  C.y = 0.5x  D.y =

Answers

Answer 1

Answer: $(1)\n f(x)=30x\ \ \ \Leftrightarrow\ \ \ (f(x))/(x) =30\ \ \ \Rightarrow\ \ \ constant=30\ \ \ \Rightarrow\ \ \ Ans.\ B.\n\n(2)\nconsatnt= (y)/(x) = (4)/(1) =4\ \ \ \Rightarrow\ \ \ Ans.\ D.\n\n(3)\nf(x)=m\cdot x\ \ \ and\ \ \ f(6)=8\n\nm\cdot6=8\ \ \ \Rightarrow\ \ \ m= (8)/(6) = (4)/(3) \ \ \ \Rightarrow\ \ \ y= (4)/(3)x\ \ \ \ Ans.\ (?)$

$(4)\nf(x)=m\cdot x\ \ and\ \ f(8)=56\n\nm\cdot8=56\ \ \Leftrightarrow\ \ m= (56)/(8) =7\ \ \Rightarrow\ \ \ f(x)=7x\ \ \ \Rightarrow\ \ \ f(2)=7\cdot2=14\n\nAns.\ D.\n\n(5)\ndirect:\ \ y=m\cdot x\ \ \ and\ \ \ m\in R\ne.g.:\ \ y=2x,\ \ y=0.5x,\ \ y= (x)/(7)= (1)/(7)x,\ ...\n\nNOT\ direct:\ \ \ e.g.:\ \ y= √(x) ,\ \ y= (1)/(x),\ \ y=x^2,\ ...$

Answer 2

Answer:

the answer is D i have this test and its the right answer for 2 reasons

1,its the only thing that looks like english

2,its always the right answer in anime logic

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To find an equivalent fraction, multiply the numerator and the denominator each by the same number.

So with your fraction, you can multiply the top and bottom each by 2.
4*2 = 8
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8/10 is equivalent to 4/5.

Now do the same thing but this time multiply by another number (integer) to get another equivalent fraction.

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100%of their bill is $47.60

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The expression that can be used to determine the total bill is 1.20 x ($47.60)

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To learn more about the total cost of an item, please check: brainly.com/question/25717996

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