The equation shows a linear relationship because it is increasing over the entire domain.
The linear regression equation of best fit is: y = 0.55x - 2.25.
<h3>When a relationship is linear?</h3>
A relationship is linear when it is either increasing or decreasing over the entire domain, that is, it has no turning points.
For this problem, the hair length is increasing over the entire domain, hence it is a linear relationship.
<h3>How to find the equation of linear regression using a calculator?</h3>
To find the equation, we need to insert the points (x,y) in the calculator.
For this problem, the points are given as follows:
(9,3), (13,5), (18,7), (22,10), (23,11).
Inserting these points into the calculator, the line of best-fit is given by:
y = 0.55x - 2.25.
More can be learned about linear relationships at brainly.com/question/24808124
#SPJ1
