Question 1201024
<pre>
The vertex of this parabola is at (1, 2). When the x-value is 0, the y-value is 0. What is the coefficient of the squared term in the equation of this parabola? 

I don't know where or how to start, please help me.

Equation of a parabola: {{{matrix(1,3, y, "=", a(x - h)^2 + k)}}}, where a is the coefficient of the squared term
                     {{{matrix(3,3, 0, "=", a(0 - 1)^2 + 2, 0, "=", a + 2, highlight(- 2), "=", a)}}} ----- Substituting (0, 0) for (x, y), and (1, 2) for (h, k)</pre>