Question

(-3,-9) (1,-1) calculate the gradient of the line

Answer 1

Gradient = (-1 - (-9)) / (1 - (-3))
Gradient = 8/4 =2
Gradient = 2

Answer 2

Gradient is another word for slope. So, just calculate the slope:
\[\frac{rise}{run} = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]