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Open Up - Grade 7 - Mathematics - Unit 2 - Lesson 14

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Last updated over 2 years ago
8 Questions
1
1.
The equation c = 2.95g shows how much it costs to buy gas at a gas station on a certain day. In the equation, c represents the cost in dollars, and g represents how many gallons of gas were purchased.

Using the equation above match the values. (g is on the left, c is on the right.)
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2.95
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5.90
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29.50
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59.00
7.RP.2.a
6.RP.3.a
7.RP.1
1
2.
The equation c = 2.95g shows how much it costs to buy gas at a gas station on a certain day. In the equation, c represents the cost in dollars, and g represents how many gallons of gas were purchased.

Create a graph of the relationship.
7.RP.2.a
6.RP.3.a
7.RP.1
1
3.
The equation c = 2.95g shows how much it costs to buy gas at a gas station on a certain day. In the equation, c represents the cost in dollars, and g represents how many gallons of gas were purchased.

What does 2.95 represent in this situation?
7.RP.2.a
6.RP.3.a
7.RP.1
1
4.
The equation c = 2.95g shows how much it costs to buy gas at a gas station on a certain day. In the equation, c represents the cost in dollars, and g represents how many gallons of gas were purchased.

Jada’s mom remarks, “You can get about a third of a gallon of gas for a dollar.” Is she correct?
7.RP.2.a
6.RP.3.a
7.RP.1
1
5.
There is a proportional relationship between a volume measured in cups and the same volume measured in tablespoons. 3 cups is equivalent to 48 tablespoons, as shown in the graph.


Plot and label at least two more points that represent the relationship.

Use a straightedge to draw a line that represents this proportional relationship.
7.RP.2.a
6.RP.3.a
7.RP.1
1
6.
There is a proportional relationship between a volume measured in cups and the same volume measured in tablespoons. 3 cups is equivalent to 48 tablespoons, as shown in the graph.


For which value y is (1,y) on the line you just drew?
7.RP.2.a
6.RP.3.a
7.RP.1
1
7.
There is a proportional relationship between a volume measured in cups and the same volume measured in tablespoons. 3 cups is equivalent to 48 tablespoons, as shown in the graph.


  1. What is the constant of proportionality for this relationship?
7.RP.2.a
6.RP.3.a
7.RP.1
1
8.
There is a proportional relationship between a volume measured in cups and the same volume measured in tablespoons. 3 cups is equivalent to 48 tablespoons, as shown in the graph.


  1. Write an equation representing this relationship. Use c for cups and t for tablespoons.
7.RP.2.a
6.RP.3.a
7.RP.1
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