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Cathy places an ad in the neighborhood newsletter advertising her pet-sitting service. Her fees are listed in the table.

What will Cathy charge to pet sit for 8 days?
A. $67.50
B. $60.00
C. $52.50
D. $45.00

Cathy places an ad in the neighborhood newsletter advertising her petsitting service Her fees are listed in the table What will Cathy charge to pet sit for 8 da class=

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Answer:

B) $60.00

Explanation:

The cost for pet sitting per day (1 day) is $7.50

Then for 8 days, Cost = per day price × number of days = $7.50 × 8 = $60

∴ Cathy charge $60 to pet sit for 8 days.

Take two points

  • (2,15)
  • (4,30)

Slope

  • m=30-15/4-2
  • m=15/2
  • m=7.5

Equation

  • y-15=7.5(x-2)
  • y=7.5x-15+15
  • y=7.5x

So for 8 days

  • y=7.5(8)
  • $60.00

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