Answer
$y=-3x+10$
Work Step by Step
Let $(x_{1},y_{1})=(3,1)$ and $(x_{2},y_{2})=(0,10)$
Slope $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{10-1}{0-3}=\frac{9}{-3}=-3$
Because the line crosses the y-axis at $(0,10)$,
Y-intercept $b=10$.
Slope-intercept form is
$y=mx+b$.
Substituting the values of $m$ and $b$, we get an equation of line as
$y=-3x+10$
