Page 99 - Math Course 3 (Book 1)

Slope of a Line

Find the slope of the line. Your Turn!

Use Rise and Run to Find Slope

Find the slope of a hill that rises 40 feet for every
horizontal change of 100 feet.

A. 5
2

B. 2
5
2
Y – y C. 3
2
m = x – x 1 1 Definition of slope 3
2
3 – 1 (x , y ) = (3, 1) D. 5
m = 1 1
–3 – 3 (x , y ) = (–3, 3) Answer
2
2
2 1
m = or – Use a Graph to Find Slope
–6 3
Find the slope of the line.
1
Answer The slope is – .
3 7
A.
3
7
Positive and Negative Slopes B. – 3

Examples C. 3
7

D. – 3
Find the slope of the line that passes through the 7
following pair of points. B(2, 7), C(–3, –2)
y – y Answer
2
m = x – x 1 Definition of slope
2 1
m = –2 – 7 (x , y ) = (2, 7)
1
1
–3 – 2 (x , y ) = (–3, 2)
2 2
m = –9 or 9 Find the slope of the line.
–5 5

2
Answer The slope is 9 A. 1 (–4, 3)
5 1
B. –
2
Find the slope of the line that passes through the 5
following pair of points. F(–5, 1), G(–3, –6) C. – 6

y – y 6
2
m = x – x 1 Definition of slope D. – 5
2 1
m = –6 – 1 (x , y ) = (–5, 1)
1
1
–3 – (–5) (x , y ) = (–3, –6)
2 2 Answer
m = –7
2
Answer The slope is – 7
2

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