Consider the function f(x) = 5x - 2.If f(x) = -22, what is x? What point is on the graph of f?

Question

asked Jun 5, 2023 125k views

1 Answer

Peter Bence · Answer 1 · 2023-06-11T19:29:02+0000

Having the expression for f(x), and knowing the value of f(x) (-22), we just need to equate those expressions:

Obtaining the following equation with one unknown:

Solving for x:

$\begin{gathered} 5x=-22+2 \\ \\ 5x=-20 \\ \\ x=-(20)/(5) \\ \\ x=-4 \end{gathered}$

Answer B: when f(x) = -22, we have that x = -4.

And this will correspond to the point (-4,- 22)