Determine the slope and the y-intercept of the graph of the equation.
-$$x + y + 9 = 0$$
A) $\mathrm { m } = - 1 ; ( 0 , - 9 )$
B) $\mathrm { m } = 1 ; ( 0 , - 9 )$
C) $\mathrm { m } = 0 ; ( 0 , - 9 )$
D) $\mathrm { m } = - 1 ; ( 0,9 )$

Question

Quizplus · Accepted Answer

To find the slope and y-intercept, the equation needs to be in slope-intercept form, $y = mx + b$. Rewriting $x + y + 9 = 0$ as $y = -x - 9$, we see the slope $m = -1$ and the y-intercept is $(0, -9)$.

Determine the Slope and the Y-Intercept of the Graph of the Equation