AIM: How can we use proportions to solve word problems?
HW: Prepare for quiz tomorrow.
Do Now: What is being compared in each statement below (use words, not numbers).
1) A pizza delivery guy can deliver 5 pizzas in 45 minutes.
2) The teacher grades 3 quizzes every 12 minutes.
3) Mr. Severiano drinks 17 fl. oz. of water every 53 minutes
Announcement: There will be a quiz tomorrow on ratios and proportional reasoning. Please be prepared.
Classwork: We identified useful strategies to solve proportion word problems.
First, determine the things that are being compared and then write a proportion with WORDS ONLY.
Then, substitute the numbers into their appropriate place in the proportion. Use a variable for unknown values.
Next, use cross multiplication or scale factors to solve for the missing variable value.