Many doctors worry that heavy backpacks cause shoulder and back pain in students. Some doctors believe that backpacks should not weigh more than 10% of a student's body weight
The body and backpack weights of eight high school students are given here, along with a scatterplot of the data.
Weight (lbs)
Backpack
weight (lbs)
36
o
120
26
32
o
187
30
28
Backpack weight (lbs)
O
109
26
103
24
24
131
29
20
165
35
100
158
120 140 160 180
Student weight (lbs)
31
116
28
a.
Find a trend line for the data. Write your equation in slope-intercept form.