posted by Linda on .
Sally wants to buy her friend a bouquet for his birthday. She wants it to contain both carnations and roses. She has $25.20 to spend. Carnatinos cost $1.45 each and roses cost $2.35 each. Use a graph to show the possible combinations of numbers of carnations and roses Sally can afford to buy.
1.45c + 2.35r = 25.20
If you graph that you will see various combinations that fall just below the line.
For example, 5 carnations and 7 roses cost $23.70