### Home > PC3 > Chapter 6 > Lesson 6.2.2 > Problem6-89

6-89.

Calculate the slope of the line joining $\left(1, f\left(1\right)\right)$ and $\left(4, f\left(4\right)\right)$ if:

1. $f(x)=8-x^2$

$m=\frac{f(4)-f(1)}{4-1}$

1. $f(x)=2^x$