Unit 5 - Analytic Geometry Equation Of A Line In 'Slope Y-Intercept' Form Worksheet Page 22
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31MPM1D1
Unit 5 – Analytic Geometry
Mr. Kwok
Day 6
Parallel and Perpendicular Lines
Find the equations from both sets of graph below.
Answer the following questions to help draw some conclusions for parallel and perpendicular lines:
Graph 1:
Graph 2:
y
y
10
10
8
8
6
6
4
4
2
2
-10
-8
-6
-4
-2
2
4
6
8
10
-10
-8
-6
-4
-2
2
4
6
8
10
x
x
-2
-2
-4
-4
-6
-6
-8
-8
-10
-10
Graph 1:
Graph 2:
Equation #1: ______________
Equation #1: ______________
Equation #2: ______________
Equation #2: ______________
What do you notice about the equations
What do you notice about the equations
of parallel lines?
of perpendicular lines?
Example 1
Reasoning about slope to determine whether the lines are parallel or perpendicular
x
2
y
4
−
= .
Determine which of the following line are parallel and which are perpendicular to the line defined by
2
4
y
2
x
8
y
x
2
y
x
2
= −
+
b) =
+
=
+
a)
c)
4
5
Day 6
Page 1
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