Lesson 12.2 Using Regression

$$y=0.075x-0.21$$

$$y=0.093x+2.52$$

$$y=-0.005x-32.4$$

$$y=0.854x+0.91$$

$$r=0.84$$

$$r=0.67$$

$$r=0.919$$

$$r=2.5$$

$5.36

$4.60

$1.50

$3.50

$$y=302.50\left(0.743\right)^x$$

$$y=118.02\left(0.999\right)^x$$

$$y=201\left(0.543\right)^x$$

$$y=116.01\left(0.966\right)^x$$

Linear

Quadratic

Exponential

$$y=-0.621x^2+17.81x-34$$

$$y=-0.550x^2+12.786x-40.857$$

$$y=-0.330x^2+10.696x-34.857$$

$$y=0.778x^2+15.71x-7.110$$

9.73 or 9:43 a.m.

22.67 or 12:30 midnight

22.64 or 10:38 p.m.

16.01 or 2:00 p.m.