Question

Which of the following statements are true? Check all that apply.

Answer 1

In general, multiplying a function by some constant k will stretch its graph vertically by a factor of k if k>1, or shrink its graph vertically by a factor of k if k<1. In this case, k=2>1, so statement A is true.

The function
`f(x)=2√(x)` only accepts nonnegative inputs (so its domain is x>=0), and its outputs span all the nonnegative real numbers (range y>=0). This is also true of
`f(x)=√(x),` so statement C is also true.