This line is already in slope-intercept form.
The slope of the line is 9, and the y-intercept is 0.
Because of this, we can find every y value for any x value simply by replacing x with the value of the x coordinate.
By replacing x with 2, we can see what the y coordinate would be when x is 2.
9(2) = 18
The y value would be 18, which is not 10, meaning (2, 10) is not a solution to the equation.