What is the slope of the line passing through (1,-1); (-4,-8)?

2 Answers
Mar 13, 2018

A slope's gradient (m) is equal to its rise (change in y value), over run (change in x value) or (y_2 - y_1)/(x_2 - x_1).
Let (x_1,y_1) = (1,-4) and (x_2,y_2) = (-4, -8).
Substituting our values into this formula and solving, we get:
m = (-8+4)/(-4-1)
m = (-4)/-5
m = 4/5
Therefore the gradient of the slope is 4/5 or 0.8.

Mar 13, 2018

The slope of the line is 7/5

Explanation:

The slope of the line passing through (1,-1) and (-4,-8) is

m= (y_2-y_1)/(x_2-x_1)= (-8+1)/(-4-1)= (-7)/-5=7/5

The slope of the line is 7/5 [Ans]