Graph the following function. Show the axis of symmetry, the vertex, and all of your work on how you graphed it.
1 answer:
Answer:
the axis of symmetry is x = -1
the vertex is (-1,8)
the y intercept is (0,5) let x=0
because it is symmetrical
x=-2 will also be -5 (-2,5)
Step-by-step explanation:
y = -3x^2 - 6x + 5
to find the axis of symmetry ax^2 +bx+c
h = -b/2a
h = -(-6)/ 2 (-3)
h = 6/-6
h = -1
the axis of symmetry is x = -1
the vertex is (h,k)
to find k substitute h into the equation
k (or y) = -3 (-1)^2 -6(-1) +5
k = -3 *1 +6+5
k = 8
the vertex is (-1,8)
the y intercept is (0,5) let x=0
because it is symmetrical
x=-2 will also be -5 (-2,5)
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