The table shows information about the heights, in cm, of a group of Year 9 girls. least height
150 cm
median
165 cm
greatest height
170 cm
This stem and leaf diagram shows information about the heights, in cm, of a group
of 15 Year 9 boys.
15
8 9 9
16
4 5 7 7 8
Key: 15 8 represents 158 cm
17
0 3 4 4 7
18
02
Compare the distribution of the heights of the girls with the distribution of the heights of
the boys.​

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)