How can you show an infinite number
of possible answers?
Egg salad: $5 per pound
1 pound for $5
3 pounds for $15
20 pounds for $100
In this lesson you will learn
to display all the possibilities
in a proportional relationship
by graphing.
Let’sReview
Review
Let’s
Proportional relationships
30 miles every 2 hours
2 pounds cost $6
A Common
Let’s
Review Mistake
Use equal steps for a graph’s scales!
(1, 2)
12
11
(2, 5)
8
5
(3, 11)
2
4
1
2
3
Core
Lesson
Let’s
Review
Weight
(lb.)
2
4
6
Cost
($)
6
12
18
2 pounds for $6
Core
Lesson
Let’s
Review
4
6
Cost
($)
6
12
18
Cost ($)
Weight
(lb.)
2
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Weight (lb.)
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Core
Lesson
Let’s
Review
30 miles in 2 hours
Distance (mi.)
45 miles in 3 hours
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Time (hr.)
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In this lesson you have
learned to display all the
possibilities in a proportional
relationship by graphing.
Guided
Practice
Let’s
Review
Graph the proportional relationship
“3 pounds of egg salad for $2.”
State in words
the proportional
relationship
shown here.
(There are many
correct
answers!)
Distance (ft.)
Guided
Practice
Let’s
Review
y
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x
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Time (min.)
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Guided
Practice
Let’s
Review
Multiple choice: Which graph shows a
proportional relationship?
A.
B.
C.
D.
Extension
Let’s
Review Activities
Graph a proportional relationship with
negative quantities, like “a loss of 3
dollars per day.” Discuss why the graph
is in the fourth quadrant.
Extension
Let’s
Review Activities
Graph a relationship that is not
proportional. Discuss why it is not.
Side of a
Area of the
square (in.) square (in.2)
1
2
3
4
Quick Quiz
Let’s
Review
Graph the proportional relationship
“15 miles in 3 hours.”
State in words
the proportional
relationship
shown here.
(There are many
correct
answers!)
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Cost ($)
Quick Quiz
Let’s
Review
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Weight (ounces)
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