How do you find the slope of the line through the points (1,-2), and (3,-8)?

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Answer 1 · 2016-02-18T18:22:22

The slope $= - 3$ $=-3$

The points are :
$(1, - 2) = x_{1}, y_{1}$ $(1,-2) = color(blue)(x_1,y_1$

$(3, - 8) = x_{2}, y_{2}$ $(3,-8) = color(blue)(x_2,y_2$

Slope is calculated using formula: $\frac{y_{2} - y_{1}}{x_{2} - x_{1}}$ $(y_2-y_1)/(x_2-x_1)$

$= \frac{- 8 - (- 2)}{3 - 1}$ $=(-8 - (-2))/(3-1$

$= \frac{- 8 + 2}{2}$ $=(-8 + 2)/(2$

$= \frac{- 6}{2}$ $=(-6)/(2$

$= - 3$ $=-3$