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5.2 Defining Slope
Lesson Essential Question: Can you calculate slope using rise over run and the formula for finding slope?
"Bellringer"
Given the equation 4x + y = 36
(8 , ?) Find y.
a) y = 3b) y = 4c) y = 5d) y = 6
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What word(s) come to mind when you hear the word SLOPE?
_____________________ is the ratio of vertical rise to horizontal run.
Formula for Slope:
y2 - y1
x2 - x1
Examples
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What do all of these lines have in common?
All of these lines have ___________________________ slope.
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What do all of these lines have in common?
All of these lines have ___________________________ slope.
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Bellringer
Find the slope of a line containing the points ( -1 , 7 ) and (8 , -3)
a.) - 9b.) -10 / 9c.) -9 / 10d.) - 10
The line below has...
a.) positive slopeb.) undefined slopec.) zero sloped.) negative slope
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1.)Plot the point (1,2)
2.)Graph a line with a slope of 3/4 from that point.
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Horizontal Lines
Step 1.) Draw a horizontal line on the graph below
Step 2.) Pick any two points on the line
Step 3.) Calculate the slope from those two points
What is the slope of a horizontal line?
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Vertical Lines
Step 1.) Draw a vertical line on the graph below
Step 2.) Pick any two points on the line
Step 3.) Calculate the slope from those two points
What is the slope of a vertical line?