Select the correct answer.
A daycare center charges $3 per hour for preschool-aged children and $4 per hour for infants and toddlers. This equation represents the number of preschoolers, x, and infants and toddlers, y, at the daycare center in an hour when it earns $180:

3x + 4y = 180.

Which graph represents the relationship?

A.
A linear graph shows the Day-care Center graph represents Pre-schoolers on the x-axis and Infants and Toddlers on the y-axis. A line is drawn from (0, 45) to (60, 0)
B.
A linear graph shows the Day-care Center graph represents Pre-schoolers on the x-axis and Infants and Toddlers on the y-axis. A line is drawn from (0, 60) to (60, 0)
C.
A linear graph shows the Day-care Center graph represents Pre-schoolers on the x-axis and Infants and Toddlers on the y-axis. A line is drawn from (0, 45) to (45, 0)
D.
A linear graph shows the Day-care Center graph represents Pre-schoolers on the x-axis and Infants and Toddlers on the y-axis. A line is drawn from (0, 60) to (45, 0)