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IntroductionTo Slope
Slope is a measure ofsteepness.
Types of Slope
PositiveNegative
Zero
Undefinedor
No Slope
Slope is sometimesreferred to as the“rate of change”
between 2 points.
The letter “m” isused to represent
slope.
run
risem
When given two points (x1,y1) and (x2,y2), use the formula:
12
12
xx
yym
Find the slope of the line through the
points (3,7) and (5, 19).
x1y1 x2y2
Example #1:
Find the slope of the line through the
points (3,7) and (5, 19).
m = 19 – 7
5 – 3 m = 12 2
m = 6
Example #1 (continued):
(3, 4) and (-6, -2)
m = -2 – 4 -6 – 3 m = -6 -9
m = ⅔
Example #2:
What if thenumerator is 0?
Then the line has a slope of zero.
What if thedenominator is 0?
Then the line has no slope, because division by zero
is undefined.
Tonight’s HomeworkTonight’s Homework
pg. 321 #1-27 (odd)
The End
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