Which is not true about a direct proportion? a. its graph must go through the origin. b. its graph must be linear. c. its graph must have a slope of 1. d. its graph must have a constant slope.

C is untrue I believe. Correct me if I'm wrong!

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.