Treat the data as ordered pairs. From the table, write the years as x - coordinate and the percent as y - coordinate.

From the table, the two points are .

Substitute the values of in the slope formula .

.

To write the line equation, we can use either of the two given points.

Consider the point .

Substitute in point-slope form equation or .

Add 66.5 to each side.

The line equation is .

Substitute the value of in the above equation.

.

The sample answer 101 percent.