Question

What is the slope of a line that with the points (2,4) and (4,-2)?

Answer 1

Remember that the slope `m` represents the rate of change of `y` when `x` changes or:
`m=(Deltay)/(Deltax)=(y_2-y_1)/(x_2-x_1)=(-2-4)/(4-2)=-6/2=-3`