Question 69067
The slope is the change in y over the change in x, or the "rise" over the "run"
So to find the change in y, subtract the y values of the two points; and to find the change in x, subtract the x coordinates.
Slope: {{{m=(y[2]-y[1])/(x[2]-x[1])}}}

20.
using the slope formula
{{{m=(-2-3)/(4-(-1))}}}
{{{m=-5/5=-1}}}
Once we have the slope we can plug in any point to complete the equation. Lets plug in (-1,3) into the general form of the linear equation y=mx+b to solve for b, the y-intercept.
{{{y=mx+b}}}Start with the general form
{{{3=(-1)*(-1)+b}}}Plug in known values
{{{b=3-1=2}}}Solve for b
So the equation is y=-x+2

24. Use the same procedure
{{{m=(4-(-3))/(2-2)}}}
{{{m=7/0}}}Now I must remind you that 7/0 is not defined, so there is no slope
In this case, the equation isn't even in y form; the equation is in x form. So the equation is simply x=2.