Question

How do you graph `y=cosx-4`?

Answer 1

You lower the function by 4 in the y-direction.

Explanation:

This is cos(x)
graph{cos(x) [-20, 20, -10, 10]}

As we lower the graph by 4 it becomes the desired function--
cos(x)-4
graph{cos(x)-4 [-20, 20, -10, 10]}