Question

Use the Desmos kept grabbing calculator to generate the least squares regression line and statistics for the data in the table. What is the residual value for X =18

X Y

2 3

4 9

11 12

15 17

18 16

25 22

Answers:

-0.4216

-1.2389

0.4216

2.5784

Answer 1

$$y=mx+b$$

$m=0.7404, b=3.9117$

$$y=0.7404x+3.9117$$

$x=18$

$$y=0.7404(18)+3.9117=17.2389$$

Residual

$$16-17.2389= -1.2389$$

-1.2389