Question

Colin creates the graph below to represent the relationship between the number of students and the number of buses needed for the trip.

image.png



Colin's graph is incorrect. Select TWO of the errors that Colin made.


The graph should have 10 steps instead of 5.


The first step should extend to (20, 1) instead of (40, 1).


The last step should extend to (180, 5) instead of (200, 5).


Each step should begin with an open dot and end with a closed dot.


The graph should be a continuous line segment extending from (0, 0) to (200, 5).

Answer 1

- The graph should have 10 steps instead of 5.
- The first step should extend to (20, 1) instead of (40, 1).

Reason: each bus holds 20 students, so the number of buses increases every 20 students (not every 40), giving 10 steps from 0 to 200 and the first step should cover students 1–20 (end at x = 20).