110203 Vertex applications

# The first four parts of this problem will ask you to

• Notes
• apiccirello
• 2

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The first four parts of this problem will ask you to use all four methods of finding the coordinates of the vertex. a. Find the zeros of R ( x ), then use the zeros to find the coordinates of the vertex. b. Rewrite the formula for R ( x ) in the ax 2 + bx + c form, then use the a b 2 - formula to find the coordinates of the vertex. c. Rewrite the formula for R ( x ) in vertex form, and use this to identify the vertex. d. On a graphing calculator, graph R ( x ) and find its vertex. e. You should have gotten the same x and y coordinates for the vertex from the first four parts of this problem. Do all your answers agree? f. In this problem, which of the four methods for finding the vertex was the easiest? Why? g. What do the coordinates of the vertex tell you about the cookie sale? Hint for the last two problems: You will need to use the relationship profit = revenue cost . 5. Do problem 60 on page 335 of the textbook. 6. Do problem 63 on page 336 of the textbook. photo credits: gatewayarch.com, goldengatebridge.org
• Fall '12
• JenniferSera
• Algebra, Quadratic equation, Vertex, Suspension bridge

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