Answer:
Option A
Step-by-step Explanation:
Let the number of pre-schoolers be x
Let the number of infants and toddlers be y
The day care charges $3 per hour for preschool aged and charges $4 for infants and toddlers
Since, the day care earns a total of $180 in an hour
Therefore, the equation becomes
3x + 4y = 180
To find x , isolate y by making the value of y zero
3x + 4y = 180
3x + 4(0) = 180
3x + 0 = 180
3x = 180
Isolate x
3x/3 = 180/3
x = 180/3
x = 60
Therefore, 60 preschools aged were in the daycare
To find y, isolate x by making x = 0
3x + 4y = 180
3(0) + 4y = 180
0 + 4y = 180
4y = 180
Isolate y
4y/4 = 180/4
y = 45
Therefore, there 45 infants and toddlers
Therefore, the graph that best represents the above values is graph A----- Option A