1. suppose y varies directly with x, and y = 14 when x = –4. what is the value of y when x = –6?
–21
10
18
21
2. suppose y varies directly with x, and y = 25 when x = 140. what is the value of x when y = 36?
140
165
201.6
176
3. the point (12, 9) is included in a direct variation. what is the constant of variation?
one half
three fourths
1
2

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Describe a situation that you could represent with the inequality x< 17