Treat the data as ordered pairs.

Plot the ordered pairs as points in a coordinate plane.

The scatter plot shows a positive correlation between x and y.

This means that as the x - values increased, the y - value tended to increase, so you can fit a line to the data.

Draw a line that appears to fit the points in the scatter plot closely.

Write an equation using any two points on the line.

Two points are .

Substitute the values of in the slope formula .

.

To find the y - intercept, substitute the values of in the slope - intercept from of equation and solve for b.

Subtract 22.5 from each side.

.

Substitute the values of in the slope - intercept form of equation .

The equation of line is .