A copying service charges a uniform rate for the first one hundred copies or less and a fee for each additional copy. Nancy Taylor paid 7.00 to make 200 copies and Rose Barbi paid 9.20 for 310 copies.
a) Write two ordered pairs (x,y) where x represents the numbers of copies over one hundred and y represents the cost of the copies.
b) Write an equation in the form of y=mx+b that expresses the value of y, the total cost of the copies, in terms of x, the number of copies over one hundred.
c) What is the cost of the first one hundred copies?
d) What is the cost of each additional copy
http://www.jmap.org/JMAP/SupportFile...Chapter_10.pdf Look at Pg 407 number 15