Assess Do You KNOW HOW? Do You UNDERSTAND? Find the vertex and y-intercept of the quadratic 1.9 ESSENTIAL QUESTION What key features function. can you determine about a quadratic function 5. y = 3x2 - 12x + 40 from an equation in standard form? 6. y = -x2 + 4x+ 7 2. Error Analysis Cameron said that the y-intercept of a quadratic function always tells the maximum value of that function. Explain For 7 and 8, find the maximum or minimum of the Cameron's error. @ MP.3 parabola. 7. y= -2x2 - 16x + 20 Edrool 8. y=-x2+ 12x-15 3. Vocabulary Write a quadratic function in standard form. 9. Find the equation in standard form of the parabola that passes through the points (0, 6), (-3, 15), and (-6, 6). 4. Make Sense and Persevere Why do you need 10. y = 3x2 + 6x - 2 at least three points to graph a quadratic function when not given an equation? @ MP.1 11. y = -2x2 + 4x+1