A local newspaper charges $18 for the first 3 lines of a want ad, and then $6.50 for each additional line. Express the cost of an x-line ad, c (x), as a piecewise function. unit 5 financial algebra

c (x) =

18x for x≤3 54 + 6.5 (x - 3) for x >3

Step-by-step explanation:

Charges are : -

$ 18 for the first three lines of the add and $6.50 for each additional line

Thus,

for x ≤ 3, cost will be c (x) = 18x

and if x > 3, cost for the first 3 lines will be 18*3 = 54 dollars and then cost will increase by $6.50 for each additional line.

Thus c (x) = 54 + 6.5 (x - 3)

So, the piecewise defined function c (x) can be represented by : -

c (x) =

18x for x≤3 54 + 6.5 (x - 3) for x >3