+948 The parabola y = ax^2 + bx + c is graphed below. Find a + b + c. (The grid lines are one unit apart.)
The parabola passes through (-2,8), (0,0), and (2,8).
+1239
There is no graph shown. Relying only on the three points provided, one
parabola that passes through the points (–2,8), (0,0), and (2,8) is y = 2x2
If that is correct, then a + b + c = 2 + 0 + 0 = 2.
Those three points, and the vertex at (0,0), indicate that the parabola
is symmetrical to the y-axis and that the equation has a double root.
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