Answer
$I=-11.85P+797.71$
Work Step by Step
Using desmos.com, we enter a table (columns labeled as $P$= price of oil and $I$=income), enter the data points, and in a new cell, enter$\quad I\sim mP+b$
The calculator returns $\left\{\begin{array}{l}
m=1.37993\\
b=-24.0358\\
r=0.9436
\end{array}\right.$
where $r$ is the regression coefficient.
$|r|$ is not close to 1, indicating a bad fit for the data.
Rounding coefficients, the regression line is given by
$I=-11.85P+797.71$
