Question

Identify the phase shift of each function. Describe each phase shift use a phrase like 3 units to the left

Answer 1

It moves horizontally 1/2 units to the left

It moves vertically 2 units up

Explanation:

∵ y = Acos(Bx - C) + D

∵ y = 2 - 3cos(2x + 1)

∴ The phrase of shift:

∵ The horizontally shift is -C/B = - 1/2 = -1/2

∴ It moves 1/2 units to the left

∵ The vertically shift is D

∴ It moves 2 units up