Question

Suppose y varies directly with x, and y = 8 when x = –6. What direct variation equation relates x and y? What is the value of y when x = –2?
A. y = –0.75x; 1.50
B. y = –1.33x; 2.67
C. y = 1.33x; –2.67
D. y = 0.13x; –0.25

Answer 1

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Answer 2

i have no idea how to do this\

Answer 3

\(y=k*x\) for some \(k\in \mathbb{Z}\) Now we can use the point given to figure out what \(k\) is.

We use the point \((-6,8)\).

\(8=-6*k\implies k = -\frac{4}{3}\)

So we have \(y = -\frac{4}{3}x\)

Now plug in \(x=-2\) to get the last part.

Answer 4

how would u simplify 2 2/3