Question

Slope $=5$ and y-intercept $=-8$, then the equation of line is $y=mx+c$. Find $m-c$.

Answer 1

The equation of any straight line can be written as $y=mx+c$, where $m$ is its slope and $c$ is its y - intercept.
Hence, the equation of the line with slope $=5$ and y - intercept $=-8$ is $y=5x-8$.

$m-c=5+8=13$