Unit 5 - Analytic Geometry Equation Of A Line In 'Slope Y-Intercept' Form Worksheet Page 24
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31MPM1D1
Unit 5 – Analytic Geometry
Mr. Kwok
Example 3
Reasoning about slope to determine the equation of a line that is parallel to another line
Determine the equation of the line that is parallel to �� = −
�� + 3 and passes through the point (14, 9).
2
7
Example 4
Selecting a strategy to determine the equation of a line that is perpendicular to another line
Determine the equation of the line that is perpendicular to y = 3x + 1 and has the same y-intercept.
Solution 1:
y
Solution 2:
10
8
6
4
2
-10
-8
-6
-4
-2
2
4
6
8
10
x
-2
-4
-6
-8
-10
Summary
Slopes of perpendicular lines are …
Slopes of parallel lines are…
Negative reciprocals …
Day 6
Page 3
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