Cal is measuring the temperature changes in four substances over different time periods as part of a school project. He records his data in the four tables shown. Which data show a proportional relationship? Choose all that apply. A Time (hours)3569 Temperature (°F)12253681 B Time (min)3479 Temperature (°F)22.53052.56 7. 5 C Time (hours)2358 Temperature (°F)10152540 D Time (min)2578 Temperature (°F)8.522.5 28.536 2 A water truck is filling a swimming pool. The equation that represents this relationship is y 5 19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool. Choose True or False for each statement. a. The unit rate for this relationship is 1 gallon per 19.75 minutes. u Tr ue u False b. This is a proportional relationship because the graph of the u Tr ue u False equation is a straight line through the origin. c. The water in the swimming pool increases by about 100 gallons u Tr ue u False every 5 minutes. d. A table of related x- and y-values for this relationship would u Tr ue u False show equivalent ratios. e. The point (8, 150) could be a point on this graph. u Tr ue u Fal