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Question

The following table shows the weights of two types of cheddar cheese and their costs. Which type of cheese can be bought more for a less amount of money?

Type I
Weight (in lb) 1 2
Cost (in $ 5 10


A
Both have the same cost per unit.
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B
Type I
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C
Both have the same cost per unit.
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D
Type II
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Solution

The correct option is B Type I
Type I
Unit rate =102=51=$5/lb

Type II
The graphs are straight lines and pass through the origin.
Hence, the graph shows a proportional relationship.
x1=0,y1=0;x2=10,y2=60
Unit rate RiseRun=y2y1x2x1=600100=$ 6/lb
5<6
Thus, type I cheese can be bought more for a less amount of money.

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