Question

Write equation for the following transformation of y=x: a vertical stretch by a factor of 6

Answer 1

A. y=6x
B. y=x/6
C.y=x+6
D. y=x-6

Answer 2

stretch affects the y value when a = 6 means 6y
original y = x 6 y on the left therefore do the same to the right

the slope is a constant ratio change in y over the corresponding change in x
if the y changes to 6 then to maintain the slope of 1 the change in x has to be 1/6(x)