Question

what is the slope of the line that passes through (2, 5) and (-1, 5)
A. -3
B. 0
C. Undefined
D. 3

Answer 1

$\bf (\stackrel{x_1}{2}~,~\stackrel{y_1}{5})\qquad (\stackrel{x_2}{-1}~,~\stackrel{y_2}{5}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{5-5}{-1-2}\implies \cfrac{0}{-3}\implies 0$