Mike created a shoe store named “Be like Mike Shoe Store.” Mike offers a frequent-buyers card. Each transaction is worth 8 points, and customers
automatically earn 20 points when they sign up.
a) Write an equation for the function that gives the card value based on
the number of transactions that have occurred.
b) What is the y-intercept for this linear function, and what does it
represent?
c) What is the slope for this linear function, and what does it represent?
d) For each 260 points, the customer receives a gift certificate. How
many transactions will it take for the customer to earn the first gift
certificate?