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Use multiple regression to find the line of best fit through the following data. What does this tell you?
y
420
520
860
740
510
630
650
760
590
680
a
1
2
3
4
5
6
7
8
9
10
b
c
23
15
64
52
13
40
36
20
19
24
d
109
121
160
155
175
90
132
145
97
107
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