I have a question. Two points on a parabola is (-4,-1) and (-10,-1). what is the equation of the axis of symmetry?
how do you find it?
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If you analyse this you would see,
when x = -4, y = -1
and x = -10 also, y = -1
That means at -4 and -10, the parabola has same value and it is symmetrical in the middle point of [-4,-10] range.
The middle point is = (-4 -10)/2
Therefore the axis of symmetry is x = -7 or x+7 =0
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