anonymous
  • anonymous
For the function h(x) = 4x - x2 - 1, (a) determine whether the graph opens upward or downward, (b) find the axis of symmetry, (c) find the vertex, (d) find the y-intercept, and (e) graph the function. 1.(a) upward, (b) x = 2, (c) (2, 3), (d) y-int = -1, (e) 2.(a) downward, (b) x = 3, (c) (3, 2), (d) y-int = -1, (e) 3.(a) upward, (b) x = 3, (c) (3, 2), (d) y-int = -1, (e) 4.(a) downward, (b) x = 2, (c) (2, 3), (d) y-int = -1, (e)
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
so its #4 (:
anonymous
  • anonymous
thank you Luis!
dumbcow
  • dumbcow
write terms in standard form: ax^2 +bx +c h(x) = -x^2 +4x -1 If sign of a is positive --> opens up negative --> opens down axis of symmetry--> x = -b/2a vertex --> take x_value from axis of symmetry and plug it into function to get y_value of vertex to find y_intercept, plug in x=0

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