Respuesta :

HJYMegan

Answer:

(0,-4)

Step-by-step explanation:

To find the y-intercept, substitute x=0

y= -3(0)^2+12(0)-4

=-4

eunice1234

Answer:

  • Axis of symmetry: x=2
  • Vertex: (2, 8)
  • Y-intercept: (0, -4)
  • Min/Max: Maximum

Step-by-step explanation:

Concept:

Quadratic equation formula: y=ax²+bx+c

Axis of symmetry formula=-b/2a

Y-intercept formula=c

Minimum or maximum is determined by the first term of the equation, which is [a]. If [a] is positive, then it is a minimum equation as the parabola heads up. If [a] is negative, then it is a maximum equation as the parabola heads down.

Given:

y = -3x² + 12x - 4

Solve:

The axis of symmetry formula = -b/2a

  • -(12)/2(-3) = 2

The Vertex

  • y=-3x²+12x-4=-3(2)²+12(2)-4=8
  • (2, 8)

Y-intercept=c=(0, -4)

Min/Max

  • Since [-3] is negative, it is maximum

Hope this helps!! :)

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