Is a 13
PROPORTIONAL RELATIONSHIPS
AND GRAPHS
FX A relationship is
If its graph
through the
The graph shows the time in hours and the
amount in dollars that Joanie earns at her job.
Choose a point
and explain what it
represents. 3-
(3,15) 152
15
hours worked
3
STEP 2 The constant of
STEP 1
50
45
40
95
3.
75
dollars earned
Zo
15
5
1 2 3 4 5 6 7 8 9 10
23

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)