Question

The following equations are transformations of the function y = 5x – 1. Match each equation with the correspondingvertical change.

Answer 1

A vertical change is an upward or downward movement along the y axis. For an upward movement, the number of units would be added while for a downward movement, the number of units would be subtracted.

Given that the original function is

y = 5x - 1,

for an upward change of d units, the function would be

y = 5x - 1 + d

for a downward change of d units, the function would be

y = 5x - 1 - d

Looking at the options, the correct option i