Slope-intercept form is y = mx + c
where m is the slope and c is the y-intercept
To find the difference between m and c, we need to the values of them first by knowing the graph of y and then picking two points lie on the graph
then substitute with the points to find m and c
so, the difference is m - c
i think the question asking for the meaning of the slope and y -intercept
the slope: represents the rate of the change between x and y or by another words how much y will change if x changed
y-intercept: is the value of y when x = 0 or also it represents the intersection with y-axis which has the coordinates of (0 , c)
for example: if y = 2x + 3
so, the slope is 2 and y-intercept is 3
so, when x changed by the rate of 1, y will be changed by the rate of 2 or twice as much as x changed
while the number 3 represents the point at which the line intersects with y-axis which is the point (0 , 3)