0 – (-1) = 1

3 – 0 = 3

1/3 = your slope.

Should be going up one and to the right three.

2) Draw a right angle and count. The line will be negative if it is higher on the left then the right. If it is higher on the right it is positive, Again, if it starts low on the left and goes up to the right, then it is positive. Hard to explain.

3) Slope is the change in y divided by the change in x.

you take the y-coordinates of each point 0 and -1 and add them making 0+-1= -1 then take the x coordinates and add them 3+0=3 making a slope of -1/3….this is a simple math problem….its Y2+Y1/X2+X1= Rise/Run (Slope)