Question

Using the given points and line, determine the slope of the line.

(1, 2) and (2.1)
slope = -1
slope = 1
slope = 2

Answer 1

m = y2-y1 / x2-x1
= 2-1 / 1-2
= 1 / -1
= -1

Answer 2

slope = -1

Explanation:

From the graph you can find the slope by starting at one point and count to the next point (rise over run). -1/1 = 1

OR

use the slope formula m = (y2-y1)/(x2-x1) = (1-2)/(2-1) = -1