Today in class students graphed multiple sets of data on the same graph and compared the steepness of the lines with their proportions.
Answers to HW: 1.a. 5 b. 1 c. 4 d. 2 e. 3 f. 6 2.a. The first graph is cost vs. volume and the second graph is calories vs. volume. Notice that the y values on the first graph are most likely dollars, and the second is a better fit for calories. b. Calories and volume are proportional - every ounce has the same number of calories. The line is straight (linear) and goes through the origin. There is more involved in the expense of making the coffee so it is not proportional. c. The constant of proportionality is 15 calories per ounce. You can determine this from either 150/10 or 360/24. Coffee has 15 calories per ounce. 3.a. Include your graph paper in your work book. b. For Lin, k = 0.3 and for Andre, k = 2/8 or 0.25 c. Lin is moving faster at 0.3 km per minute since Andre is moving at 0.25 km/min.
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October 2018
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