## Precalculus (6th Edition) Blitzer

$y=-\frac{1}{2}x+1$
Step 1. Using the given two points, we can get the slope as $m=\frac{5-(-1)}{-8-4}=-\frac{1}{2}$ Step 2. Write the line in point-slope form as $y+1=-\frac{1}{2}(x-4)$ Step 3. Rewrite the above in slope-intercept form as $y=-\frac{1}{2}x+1$