A student graphs the line represented by x + 3y = 9 by plotting the intercepts (9,0) and (0,3). They also plot a third point, (1,2), to check accuracy. Are these three points collinear?

Yes; all three points satisfy the equation x + 3y = 9, so they lie on the same line.

Yes; any three points form a straight line when graphed.

No; substituting (1, 2) gives 1 + 3(2) = 7, which does not equal 9, so the points are not collinear.

No; only intercepts can lie on the line represented by the equation.