Section 8.10: Chapter Assessment
Test your mastery of quadratic functions, their graphs, and real-life applications.
Assessment Questions
- Graph \( y = x^2 - 4x + 3 \). State the vertex, axis of symmetry, and intercepts.
- Solve by factoring: \( x^2 - 7x + 12 = 0 \).
- Solve using the quadratic formula: \( 2x^2 + 3x - 5 = 0 \).
- Complete the square: \( x^2 + 6x + 5 = 0 \).
- Projectile problem: A rock is thrown upward with \( h(t) = -5t^2 + 25t + 2 \). Find maximum height and time of flight.
- Revenue function: \( R(x) = -2x^2 + 60x \). Find number of units that maximizes revenue and the maximum revenue.
- Word problem: The product of two consecutive integers is 56. Find the integers.
- Mixed practice: Solve \( 3x^2 - 12x = 0 \).
- Graphing: Sketch \( y = -x^2 + 4x \). Identify its vertex and axis of symmetry.
- Real-life application: A rectangle has area modeled by \( A(x) = x(30 - x) \). Find dimensions that maximize the area.