I believe that you have a positive correlation. Now, draw a line of best fit and find your equation of the line.

It will be in the form, , where:

When you have drawn your line of best fit, draw a triangle and find the gradient which is calculated by:

- and will be your changing variable.
- is your gradient.
- is your -intercept.

where are coordinates of the triangle.

will be the value at which the line of best fit crosses the -axis.