A set of two variables are related non linearly can be converted to a linear equation. The line of best fit can be written in the form
Y = mX + c
where
X and Y are in terms of x and/or y
m is the gradient,
c is the Y-intercept
Recall: To find equation of straight line
(1) Equation of a straight line if gradient (m) and one points (x1,y1) are given:
Y−y1=m(X−x1)
(2) Equation of a straight line if gradient (m) and y-intercept (c) are given:
Y = mX + c
where
X and Y are in terms of x and/or y
m is the gradient,
c is the Y-intercept
Recall: To find equation of straight line
(1) Equation of a straight line if gradient (m) and one points (x1,y1) are given:
Y−y1=m(X−x1)
(2) Equation of a straight line if gradient (m) and y-intercept (c) are given:
Y=mX+c