Calvin has a gift card which he is using to buy candy (x), and he has been tracking how much money (y) he spends. He noted that after buying 4 pieces of candy (in
all) he has $28.00 left on his card and then after buying 10 pieces of candy (in all)
he has $25.00 left on his card. Write the equation of the line that represents his
spending on candy.
Write your answer as using numbers, letters, and symbols - do not use spaces.