To determine if the given coordinate of a point is a solution to the equation, substitute the abscissa to x and solve for the value of y. If the y obtained from the calculation equals to the ordinate of the point then, it is a solution. With the given above, substituting 4 to the given equation yields y = 12. The value of y is equal to that of the ordinate. Therefore, it is a solution.
The answer to this item is letter C because other ordered pair such as (-4, -12) may also fit the equation.
