Question

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

Answer 1

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

Answer 2

B) $60.00

Step-by-step 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.