Question

Describe the effect of the transformation.
(x,y)--->(x,-7y)

A. Vertical translation of -7 units.
B. Vertical stretch without reflection
C. Horizontal translation of -7 units
D. Vertical stretch without reflection

Is the answer A
D.Vertical stretch with reflection
It was supposed to say this
y---->7y would "stretch" it by a factor of 7
y ---- -7y would not only stretch it but also reflect it in the x-axis.

so it looks like D after your correction of the wording
(x,y) --> (x-1,y+4)

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