Question

Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following

equation.
y = -5x2 - 4x + 6
a. (2, 6.8)
C. (0.4, 6.8)
b. (-0.4, 6.8)
d. (-0.4, 5.2)

Answer 1

Answer: b. (-0.4,6.8)

Explanation:

Answer 2

Answer: (-0.4, 6.8)

The graph is attached

Explanation:

We can find the axis of symmetry using the formula x = -b/2a

x = - -4/2(-5)

x = 4/-10

x = 0.04

Substitute for x and calculate y

y =
`\left(0.4^(2)\right)\left(-5\right)-4\left(-0.4\right)\ +6`

y = 6.8