Question

Suppose y varies directly with x. Write a direct variation equation that relates x and y.

y = -10. when x = 2
A. y = -5x
B. y = -1/5x
C. y = 5x
D. y = 1/5x

Answer 1

If y varies directly with x, then whatever is done to y is also done to x, and vice versa.

All of the answers relate to when the value of y is positive 1, meaning we have divided the original y by -10.

We must also do this to x, as they are directly proportionate, meaning x = 2 now becomes x = -1/5

Therefore the answer is [B]

Explanation: