Question

Which of the following statements best describes the effect of replacing the graph of f(x) with the graph of f(x) + 4?

The graph shifts 4 units up.

The graph shifts 4 units down.

The graph shifts 4 units left.

The graph shifts 4 units right.

Answer 1

Up. Think of a very basic function, say y=x. If you replace that with y=x+4, you know that that 4 is also known as b, the y intercept when graphing, which means it moved 4 units up from the origin.

Making up real examples and testing them (especially if a calculator is allowed) can be really helpful for problems like this

Answer 2

thank you so much! I understand now