Question

Determine the slope between the points (-1, -5) and (5, 4)
A. 2/3
B. -1/4
C. 1/4
D. 3/2

Answer 1

y = mx + b
-5 = -1m + b
4 = 5m + b

1m - 5 = b
4 - 5m = b

b = b

m - 5 = 4 - 5m
m + 5m = 5 + 4
6m = 9
m = 9/6
m = 3/2

Answer 2

\[slope = \frac{\Delta y}{\Delta x}\]
\[\Delta y=4-(-5)\]
\[\Delta x=5-(-1)\]
slope=9/6=3/2