Question

how to find the slope of (8,10), and (1,9)

Answer 1

Using y = mx + b, insert the points one at a time into the formula:

9 = 1m + b
10 = 8m + b

Isolate b in both equations

b = 9 - m
b = 10 - 8m

set b = b
9 - m = 10 - 8m

Place like terms on the same side:

8m - m = 10 - 9

Combine terms:

7m = 1

Isolate m:

m = 1/7

Answer 2

\[m=\frac{ (y2-y1) }{ (x2-x1) }\]

Answer 3

What is the slope of the line passing through the points (2, 7) and (–1, 3)?
Would the answer to this be 3/4?

Answer 4

Almost... check to make sure you didn't reverse your x's and y's in the slope equation.

Answer 5

correct?