Question

the scatter plot shows the study time and test scores for the students in mrs. johnson’s english literature class. study time and test scores (y - axis: test scores, labeled 60, 70, 80, 90, 100; x - axis: study time (min), labeled 0, 30, 60, 90, 120). based on the results, which of the following is an appropriate score for a student who studies for 1 hour?
a. 68
b. 98
c. 82
d. 72

Explanation:

Step1: Understand the problem

We need to find the appropriate test score for a student who studies for 1 hour (60 minutes) using the scatter plot.

Step2: Analyze the scatter plot

Looking at the scatter plot, when study time is 60 minutes, we observe the trend of test scores. The points show a positive correlation, and for 60 minutes of study time, the score should be around 82. Let's check the options:

• Option a: 68 is too low (lower than the score at 0 - 30 minutes in some cases, but 60 minutes is more than that, so not appropriate).
• Option b: 98 is too high (the highest scores are around 100 for more than 90 minutes, so 60 minutes should be lower than that).
• Option c: 82 seems reasonable as per the trend of the scatter plot (the points around 60 minutes of study time are in the 80 - 90 range, and 82 fits).
• Option d: 72 is too low (lower than the scores at 30 minutes, but 60 minutes is more study time, so score should be higher than at 30 minutes in general).

Answer:

c. 82