Iwanda sells African bead necklaces through a consignment shop. At the end of May, the shop paid her $100 from the sale of 8 necklaces. At the end of June, she was paid $187.50 from the sale of 15 necklaces. Assume that the consignment shop pays Iwanda the same amount of money for each necklace sold.
a. Make a linear graph showing the relationship between the number of necklaces sold and the amount of money Iwanda gets.
b. Use your graph to estimate how much money Iwanda will get if the shop sells only 6 of her necklaces in July.
c. How much does the consignment shop pay Iwanda from the sale of each necklace?