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

A.y=6x

B.y=x/6

C.y=x+6

D.y=x-6

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

A.y=6x

B.y=x/6

C.y=x+6

D.y=x-6