Least square regressions are used to find the equation of <em>best fit between two variables</em>.
The equation of the least-squares regression line is: 
The given parameters are:





The equation of the least-squares regression line is represented as:

Where:


So, we have:






So, the equation is:


Read more about equations of least squares regression at:
brainly.com/question/2141008
Reflection because it shows an exact mirror image of it.
Answer:
1000
Step-by-step explanation:
35^2: 1225
15^2: 225
1225 - 225
The <span>fraction is equivalent to 0.333333 is 1/3. </span>
Lets use substitution
y=7x-10
y=-3
so
-3=7x-10
7=7x
1=x
now lets check
y=7(1)-10
y=-3
therefore both equations have the same value