Use linear regression to find the equation for the linear function that best fits the data.

Question

Use linear regression to find the equation for the linear function that best fits this data. Round both numbers to two decimal places.

Write your final answer in a form of an equation �=�⁢�+�.

x	1	2	3	4	5	6
y	70	89	115	133	160	183

Answer 1

Hi Emma,

It is best to use either a graphics calculator (TI-80s series) or statistical software for this question. In a TI-83--and 84 is similar--enter the x-data points into L1 and the y data points into L2. This is STAT-EDIT--you will be given lists. Then, go to STAT-Calc-2-Var Stats--enter 2nd-L1, 2nd-L2. This gives your regression equation in the form y = ax +b:

y^ = 22.74x + 45.40

I hope this helps.