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Question

# From the following graph, the amount of sand (in cubic feet) required for 380 cubic feet of basking area will be

A
106
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B
114
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C
124
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D
148
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Solution

## The correct option is B 114You know, unit rate = change in ychange in x Consider the points (60, 18) and (100, 30). ∴ Unit rate of the graph= change in ychange in x =y2−y1x2−x1 =30−18100−60 =1240 =0.3 So, the equation will be y=0.3x Here value of x will be 380 cubic feet. ∴ Putting that value, you get the amount of sand required: =380×0.3 =114 cubic feet. So, the amount of sand required for 380 cubic feet of basking area is 114 cubic feet.

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