Question

What is the slope of the line through (-9,6) and (-3,9) A: 2B: -2C: 1/2D: - 1/2

Answer 1

$\begin{gathered} \text{slope = }\frac{\Delta y}{\Delta x}=\frac{y_2-y_1}{x_2-x_1} \\ =\frac{9-6}{-3-(-9)} \\ =\frac{3}{-3+9} \\ =\frac{3}{6} \\ =\frac{1}{2} \\ \text{slope = 1/2} \end{gathered}$