Name SAAYEH ESCAL 7-3 Additional Practice Quadratic Functions in Standard Form Graph each function. Identify the y-intercept, axis of symmetry, and vertex of each function. Does the vertex represent a maximum or minimum value? 2. f ( x ) = -x2 + 4x - 2 3. f(x) = 2x2 + 4x - 6 1. f (x ) = x2 + 1 2 O do *= (0,1 ) x = (1, 6 ) Find the axis of symmetry using the formula x = =b 4. f (x ) = -9x2+ 1 5. f( x ) = -2x2 + 8x - 9 6. f(x) = 4x2 + 24x+ 131 1 = 0 X= 2 X = - 3 7. The parabola shown has the form y = ax2 + bx + c. a. What is the axis of symmetry? b. Look at the width of the parabola to find a. c. Use the formula x = = to find b. To d. What is the equation of the parabola? 8. The position of a ball after it is thrown is modeled with the function f(x) = -2(x - 1)2 + 7 in vertex form, where y is the height, in feet, above the ground and x is the horizontal distance, in feet, of the ball from where it is thrown. a. Write the function in standard form. b. What is the height of the ball when it is thrown? c. What is the horizontal distance from the point where the ball is thrown to the highest point that the ball reaches? Write each function in standard form. 9. f(xx ) = -3(x + 1) 2 - 4 10. f(x ) = -(x - 2)2 + 5 flx ) = - 3x 2-4x- 7 flx ) = - x 2 + 4 x +1 enVision Florida B.E.S.T. Algebra 1 . Teaching Resources