quantity of each ingredient to make enough pancakes to serve 10 people. 326 Chapter 13: A Quantitative Approach to Algebra and Graphino 7. Section 9.2, Learning Exercise 9 gives the following problem: inp d. our • Two workers working 9 hours made 243 parts. Worker A makes 13 parts in 1 hour If the workers work at a steady rate throughout the day, who is more productive Worker A or Worker B? - Assume that the workers begin work at the same time and both work for 9 hours a. Write an equation for each worker. b. Are the variables proportionally related? Why or why not? c. Graph the two lines. What does the slope of each line tell you? 8. Which of these five graphs show a proportional relationship? Which need to 8 7- a 6 - 2. y = 5. d. y- 4 3. Janet a Middl. schoo 1- 50 mi 15 mi his w 1 2 3 4 5 6 7 8 9. Which of the following situations provide a proportional relationship between the two 9 10 11 walle variables suggested? Make clear what the variables are. again a. C: a. The distance d traveled by a rock dropped from a tall building can be described by the equation d = 16f, where d is in feet and t is the number of seconds after the rock is dropped. b. The speed s of a falling body t seconds after it is released is given by s = 321. c. Every 7 crackers have 120 calories. d. Tickets for a balcony section cost $45 each. e. The circumference of a circle can be determined by C = 7d. qu g. A cyclist can ride around the lake at an average of 10 miles per hour.