Need on both of these, will give 50 points to answerer:

part a:
after grading the most recent chapter test, a science teacher asks twelve of his 10th-grade summer school students how long they studied for the test. their answers, as well as their corresponding test grades, were recorded on a table and placed on a scatter plot.

(scatter plot values: 0,25 1,53 2,50 2,80 3,58 4,92 6,74 6,89 8,100 10,60 10,90 12,100)

use the line of best fit shown (not provided) in the scatter plot to make a conjecture about the number of hours studied versus the resulting test grade. answer in complete sentences.

part b: algebraically write the equation of the best fit line in slope-intercept form. include all of your calculations in your final answer.