Nakeisha's math teacher plots student grades on their weekly quizzes against the number of hours they say they study on the pair of coordinate axes and then draws
the line of best fit. What does the line's y-intercept represent?
100
95
90
85
80
75
Quiz Score
70
o
60
56
50
45
0.5
1
1.5 2
4
5-5
6
2.5 3 3.5 4-55
Time Spent on Homework per Week (hours)

the answer is  

a.

4,624π mm2

step-by-step explanation:

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.

the answer is z7+8/5