Answer
$y=-\dfrac{1}{3}x-6$ (see graph)
Work Step by Step
We are given the points:
$(-9,-3),(-3,-5)$
Determine the slope of the line:
$m=\dfrac{-5-(-3)}{-3-(-9)}=\dfrac{-2}{6}=-\dfrac{1}{3}$
Determine the equation of the line using the slope and one of the points:
$y+3=-\dfrac{1}{3}(x+9)$
$y=-\dfrac{1}{3}x-3-3$
$y=-\dfrac{1}{3}x-6$
Use the two points to graph the function:
