y = x +1 is the equation of a straight line and so has no vertex.
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The equation is linear and so has no vertex.
The vertex is at the point (0, 4).
y = 3x2+2x-1 Line of symmetry: x = -1/3 Vertex coordinate: (-1/3, -4/3)
x = -3y = -14
y = x2 + 14x + 21 a = 1, b = 14 x = -b/2a = -14/2*1 = -7