Question

Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation. y=x^2+x-4

a.
(-0.5, -4)
c.
(-0.5, -4.25)
b.
(0.5, -4.25)
d.
(0.5, -3.75)

Answer 1

C. (-0.5, -4.25)
is your answer

(-b)/2a
(-1)/2(1)
x = -1/2 = -0.5

y=x^2+x-4
y = (-0.5)^2 + (-0.5) - 4
y = -1 - 0.5 - 4
y = -4.25