What is the slope of the line passing through the following points: (1, -1); (8,12)(1,−1);(8,12)?

2 Answers
Justin
May 27, 2017

slope = 13/7137

Explanation:

m=(y_1-y_2)/(x_1-x_2)m=y1−y2x1−x2
m=(12-(-1))/(8-1)=13/7m=12−(−1)8−1=137

Andy Y.
May 27, 2017

m=13/7m=137

Explanation:

Strategy: Use the slope formula and plug in the points you have been given.

Step 1. Use the slope formula

The slope formula is m=(y_2-y_1)/(x_2-x_2)m=y2−y1x2−x2

Notice this is the same as ("rise")/("run")riserun. One way to remember which variable goes in the numerator is that yy's rhymes with "rise", which rises to the top.

Step 2. Plug in your points.

You are given
x_1=1x1=1 and y_1=-1y1=−1
x_2=8x2=8 and y_2=12y2=12

m=(12-(-1))/(8-1)=(12+1)/(7)=13/7m=12−(−1)8−1=12+17=137

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