The graph below shows the relationship between x, the number of correct answers a student has on a test, and y, the number of points the student scores.
100K Y
90
Number of Points
10
0
5
10
15
20
25
Number of Correct Answers
Which coordinate pair represents the unit rate of points per correct answer?
O A (1,4)
• в. (20,5)
• c. (4,1)
• D (5 20)
To find the unit rate of points per correct answer, we need to look for the coordinates where the number of correct answers is equal to 1.
Looking at the graph, we see that at point (5, 20), the number of correct answers is 5 and the number of points is 20. This means that for every 1 correct answer, the student scores 4 points.
So, the coordinate pair (5, 20) represents the unit rate of points per correct answer as 4.