The score of student is 80 marks if she studied for 7 hours.
Given,
The scatter plot shows the time spent studying compared to test scores for Mr. Stone’s eighth-grade class. From the plot it is clear that time is shown on x axis and test scores is shown on Y axis.
We have to predict the score that a student would earn if he studied for 7 hours.
Here look at the Scatter plot we find that 7 hours is on x axis and the respective line of best fit of test score is passing through score 80.
Hence if a student is studied for 7 hours he would earn 80 marks.
For more details on scatter plot follow the link below:
https://brainly.com/question/2659237