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Notes 51.notebook
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December 03, 2013
5-1 Slope
Objective: Calculate the slope of a line; draw a line through a point with a given slope.
Notes 51.notebook
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http://goanimate.com/videos/0fPM_A_Lk2iw
http://www.youtube.com/watch?v=ZzU8x5cMRw
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Real life examples of slope:pitch of a roof
slope of a hill
drop of a river
railroad on a climbing hill
elevation of a gun barrel
looking up at the moon in the sky
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Slope or Pitch of a roof
the calculation involved in designing the slope or formula used is rise over run
a 6/12 slope means that the roof rises 6 inches for every horizontal foot (12 inches)
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Grade of a road
6 % grade over the next 3 miles means that the road climbs up 6 units for every 100 units or there is a rise of 6 for every run of 100.
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Slope = vertical change (rise)horizontal change (run)
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Find the slope of each line.
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December 03, 2013
Find the slope of each line.
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Slope = vertical changehorizontal change
change in ychange in x=
Slope = y2 - y1x2 - x1
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You can use any two points on a line to find its slope.
Find the slope of a line through A( 2, 1) and B (5, 7).
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Find the slope of the line through
C (4, 0) and D ( 1, 5).
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Draw a line through the
point (1, 2) with
a slope of ½.0
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0
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25°
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Draw a line through the
point (1, 2) with
a slope of 3.
0
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0
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69°
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HW # 44
p. 217 # 3 16,1821, 25 27
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