Find the vertex and axis of symmetry and determine the direction that the parabola opens.
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- 1. Review of Real Numbers2h 39m
- 2. Linear Equations and Inequalities3h 38m
- 3. Solving Word Problems2h 43m
- 4. Graphing Linear Equations in Two Variables3h 17m
- 5. Systems of Linear Equations1h 43m
- 6. Exponents and Polynomials3h 25m
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- 14. Conic Sections & Systems of Nonlinear Equations2h 24m
- 15. Sequences, Series, and the Binomial Theorem1h 46m
14. Conic Sections & Systems of Nonlinear Equations
Parabolas
Multiple Choice
Find the vertex and axis of symmetry and determine the direction that the parabola opens.
A
Parabola opens to the left; Vertex: ; Axis of Symmetry: y=0
B
Parabola opens to the right; Vertex: (6,0); Axis of Symmetry:
C
Parabola opens to the left; Vertex: ; Axis of Symmetry:
D
Parabola opens to the right; Vertex: (0,6); Axis of Symmetry:
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Verified step by step guidance1
Rewrite the given equation \(x = -2y^2 + 6\) in the form \(x = a(y - k)^2 + h\) to identify the vertex \((h, k)\). Here, the equation is already in vertex form with \(a = -2\), \(h = 6\), and \(k = 0\), so the vertex is \((6, 0)\).
Determine the axis of symmetry. Since the equation is expressed as \(x\) in terms of \(y\), the axis of symmetry is a horizontal line given by \(y = k\). From the vertex, \(k = 0\), so the axis of symmetry is \(y = 0\).
Analyze the coefficient \(a = -2\) to determine the direction the parabola opens. Because \(a\) is negative and the parabola is in the form \(x = a(y - k)^2 + h\), the parabola opens to the left (toward decreasing \(x\) values).
Summarize the findings: the vertex is at \((6, 0)\), the axis of symmetry is the line \(y = 0\), and the parabola opens to the left.
If needed, sketch the parabola using the vertex and axis of symmetry as references, noting the direction it opens based on the sign of \(a\).
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