Chapter 4 - Writing Linear Functions - 4.2 - Writing Equations in Point-Slope Form - Exercises - Page 185: 24

$f(x)=4$

$f(-10)=4$ can be written as $(-10,4)$ and $f(-2)=4$ as $(-2,4)$ Slope $m=\frac{4-4}{-2-(-10)}=\frac{0}{8}=0$ Point-slope form is $y-y_{1}=m(x-x_{1})$ Using the values of slope $m$ and point $(-2,4)$, we get $y-4=0(x-(-2))$ $\implies y-4=0$ $\implies y=4$ A linear function is $ f(x)=4$