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