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maria241432
maria241432
16.07.2020 • 
Mathematics

4. Find the x-intercepts and the vertex, and then graph the parabola y = (x − 4)(x + 2). Part I: Find the x-intercepts of the parabola and write them as ordered pairs. Hint: The x-intercepts are the points at which the function crosses the x-axis and y = 0. Show your work. (2 points) Part II: Write the equation y = (x − 4)(x + 2) in standard form. Show your work. (1 point) Part III: With the standard form of the equation from Part II, use the quadratic formula to identify the x-value of the vertex. Hint: The x-value of the vertex is . Show your work. (1 point) Part IV: Substitute the x-value of the vertex from Part III into the original equation to find the y-value of the vertex. Then, write the coordinates of the vertex. (1 points) Part V: On your own paper, use the x-intercepts and vertex you found in Parts I and IV to graph the parabola. Label the points on your graph. Upload a picture of your hand-drawn graph. (2 points)

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