Answer:
y = 45 + 5(x - 5)
where y is the total cost of the ad, and x is the total number of lines in the ad
Step-by-step explanation:
Let x = number of lines in the ad
Let y = total cost
If the cost of the ad is $45 for the first 5 lines and $5 for each additional line then the expression for the total cost of the ad is:
y = 45 + 5(x - 5)