Problem: Tina bought some nail polish and lip gloss at the store. The nail polish cost $4.50 per bottle and lip gloss cost $7 pe
r tube. Tina bought 9 items and spent $50.50. How many of each item did she buy? Use this 4-step plan to answer the problem above!
Step 1: Understand. What are the facts? What are you asked to find? Is there any information you will not use?
Step 2: Plan: How will you solve this problem? State which strategy you are choosing to use.
Step 3: Solve. Show your steps. What is the solution?
Step 4: Check: Also include your check. Does your answer make sense?
To find the slope, use the rise/run technique with rise as the difference in y-coordinates and run as the difference in x-coordinates. So, the rise is 6 units and the run is 3 units in this situation. Now simply put it as a fraction: 6/3, which can be simplified to 2/1, or 2.
