Shelley let (0,3) and (1,9)and (-1,1) be given points in a parablola. Determine a b and c Hi Shelley, The general form of a parabola is ^{ 2} + b x + c
If (0,3) is on the parabola then the equation must be true when x = 0 and y = 3. Substituting these values into the equation gives ^{ 2} + b0 + c = c
^{ 2} + b x + 3
Simularily if (1,9) and (-1,1) are on the parabola then ^{ 2} + b1 + 3 = a + b + 3
^{ 2} + b(-1) + 3 = a - b + 3
Solve this pair of equations for a and b. Cheers,Penny To return to the previous page use your browser's back button. |