Praxis Middle School Mathematics 5164 Domain 3: Functions Welcome to your Praxis Middle School Mathematics 5164 Domain 3: Functions 1. Praxis Mathematics (5164): Functions Given the function \( f(x) = 3x^2 - 2x + 1 \), what is \( f(-2) \)? A. 15 B. -9 C. 11 D. 5 None 2. Praxis Mathematics (5164): Functions If \( g(x) = \frac{1}{x-2} \), for which values of \( x \) is \( g(x) \) undefined? A. \( x = 0 \) B. \( x = 1 \) C. \( x = 2 \) D. \( x = -2 \) None 3. Praxis Mathematics (5164): Functions What is the range of the function \( h(x) = x^2 + 4 \) for \( x \geq 0 \)? A. \( y \geq 4 \) B. \( y > 0 \) C. \( y \geq 0 \) D. \( y > 4 \) None 4. Praxis Mathematics (5164): Functions The function \( f(x) = 2^x \) represents an exponential growth. What is the rate of growth? A. 100\% B. 200\% C. 50\% D. 20\% None 5. Praxis Mathematics (5164): Functions What is the inverse function of \( f(x) = 3x + 2 \)? A. \( f^{-1}(x) = \frac{x - 2}{3} \) B. \( f^{-1}(x) = \frac{x + 2}{3} \) C. \( f^{-1}(x) = 3x - 2 \) D. \( f^{-1}(x) = \frac{3}{x + 2} \) None 6. Praxis Mathematics (5164): Functions If the function \( k(x) = |x - 5| \) is graphed, what is its vertex? A. \( (5, 0) \) B. \( (0, 5) \) C. \( (-5, 0) \) D. \( (0, -5) \) None 7. Praxis Mathematics (5164): Functions What is the domain of the function \( f(x) = \sqrt{x + 3} \)? A. \( x \geq -3 \) B. \( x > -3 \) C. \( x \geq 3 \) D. \( x > 3 \) None 8. Praxis Mathematics (5164): Functions If \( f(x) = x^3 \) and \( g(x) = x^2 \), what is \( (f \circ g)(x) \)? A. \( x^5 \) B. \( x^6 \) C. \( x^8 \) D. \( x^9 \) None 9. Praxis Mathematics (5164): Functions The function \( f(x) = \log_2(x) \) is defined for what range of \( x \)? A. \( x > 0 \) B. \( x \geq 1 \) C. \( x > 1 \) D. \( x \geq 0 \) None 10. Praxis Mathematics (5164): Functions Which function represents a linear growth with a slope of 3 and a y-intercept of -2? A. \( f(x) = 3x - 2 \) B. \( f(x) = 3x + 2 \) C. \( f(x) = 2x + 3 \) D. \( f(x) = 2x - 3 \) None 11. Praxis Mathematics (5164): Functions If \( f(x) = 2x - 1 \) and \( g(x) = x + 3 \), what is \( (f \circ g)(2) \)? A. 7 B. 8 C. 9 D. 10 None 12. Praxis Mathematics (5164): Functions If \( f(x) = 3x^2 - 2x + 5 \) and \( g(x) = x - 3 \), what is \( f(g(2)) \)? A. 11 B. 15 C. 21 D. 25 None 13. Praxis Mathematics (5164): Functions Given the function \( h(x) = \frac{2x}{x^2 - 1} \), for which values of \( x \) is \( h(x) \) undefined? A. \( x = 1 \) and \( x = -1 \) B. \( x = 0 \) C. \( x = 2 \) and \( x = -2 \) D. \( x = 1 \) and \( x = -2 \) None 14. Praxis Mathematics (5164): Functions If the graph of \( y = f(x) \) passes through the point (2, 3) and is a horizontal line, what is \( f(5) \)? A. 2 B. 3 C. 5 D. Cannot be determined None 15. Praxis Mathematics (5164): Functions Which of the following represents the inverse function of \( f(x) = 2x + 3 \)? A. \( f^{-1}(x) = \frac{x}{2} + 3 \) B. \( f^{-1}(x) = \frac{x - 3}{2} \) C. \( f^{-1}(x) = 2x - 3 \) D. \( f^{-1}(x) = \frac{x + 3}{2} \) None 16. Praxis Mathematics (5164): Functions What is the range of the function \( f(x) = \frac{1}{x - 2} \)? A. All real numbers except \( x = 2 \) B. All real numbers except \( x = -2 \) C. All real numbers except \( f(x) = 0 \) D. All real numbers None 17. Praxis Mathematics (5164): Functions If \( f(x) = x^2 - 4x \), what are the x-intercepts of the graph of \( f \)? A. \( x = 0 \) and \( x = 4 \) B. \( x = -2 \) and \( x = 2 \) C. \( x = 2 \) and \( x = -2 \) D. \( x = 0 \) and \( x = -4 \) None 18. Praxis Mathematics (5164): Functions Which of the following is the graph of the function \( f(x) = |x - 2| + 1 \)? A. A V-shaped graph opening upwards, vertex at (2, 1) B. A V-shaped graph opening downwards, vertex at (2, 1) C. A U-shaped graph opening upwards, vertex at (2, 1) D. A U-shaped graph opening downwards, vertex at (2, 1) None 19. Praxis Mathematics (5164): Functions Given \( f(x) = x^3 \) and \( g(x) = 3x \), what is \( (f \circ g)(2) \)? A. 24 B. 12 C. 8 D. 6 None 20. Praxis Mathematics (5164): Functions If \( h(x) = 5 - 2x^2 \), what is the maximum value of \( h(x) \)? A. 5 B. 3 C. 0 D. -5 None 1 out of 20 Time is Up! Time's up