Answer:
y = Ax + 625
Explanation:
Since charges is $625 per child
let the additional amount paid for each additional charge be A
if a family has x additional children
the amount such family will pay is Ax + 625
which is in the form of the slope intercept equation where y = mx + b
The amount is then same as:
m is the slope; equalized to A and the extra amount paid for each additional child
b is intercept and equalized to 625
x is the total number of additional children each family has
y is the total amount each family pays