Question

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Q: The graph shows the cost C in dollars of w pounds of blueberries, a proportional relationship. Select ALL the true statements.

A. 1 lb (pound) of blueberries cost $2.75
B. 2.75 lbs (pounds) of blueberries cost $1
C. 5 lbs (pounds) of blueberries cost $15.50
D. 12 lbs (pounds) of blueberries cost $33
E. The point (3,9) is on the graph of the proportional relationship.

Answer 1

A, D

Step-by-step explanation:

Cost ($) = C

lbs (Blueberries) = W

One pound of blueberries costs $2.75 because to find how much 1 lb is you need to divide by 6.

6 is the number of pounds at that point in the graph, so you divide both the pounds and cost by 6 to find how much 1 lb is.

To find how much 5 lbs costs, multiply both the cost and number of pounds ($2.75 to 1 lb) by 5.

2.75 * 5 is 13.75 (This means C is wrong)

Do the same but with 12 for D

2.75 * 12 is 33, so D is correct

You could do the same method as above for E, but the easier way to do this is to see that the relationship of 3:9 is equal to a 1:3 ratio, which is the same as what the pounds to cost ratio is (which is 1:2.75)

Hope this helps! ^_^

-TheUnknownScientist