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Mathematics 20 Online
OpenStudy (anonymous):

will somebody help me with graphing quadratics?????

OpenStudy (anonymous):

Create a quadratic function, f(x), in vertex form. The a should be between 4 and –4, the h will be your birth month, and the k will be your birth day. Write your equation below. Using complete sentences, explain how to convert your birthday function into standard form. Create two additional quadratic functions, g(x) and h(x). The function g(x) will open the same direction as f(x), have the same vertex, but will be narrower. The function h(x) will open in the opposite direction as f(x), have the same vertex, but will be wider than f(x). Write your functions below and explain in complete sentences why those functions will meet the requirements in the question. Graph your functions. Include your graph below. Using complete sentences, explain how to find the average rate of change for f(x) from x = 4 to x = 7. Explain the appropriate translations of your graphs, if you were born two months earlier and 5 days later. Use complete sentences.

OpenStudy (anonymous):

10/7/96 is my birthday.

OpenStudy (amistre64):

y = a(x-h)^2 + k, fill in the parts expand it out into y = ax^2 + bx + c ; thats the standard form.

OpenStudy (anonymous):

what numbers take the place of the letters?

OpenStudy (phi):

The question tells you : ***The a should be between 4 and –4, the h will be your birth month, and the k will be your birth day.***

OpenStudy (phi):

This tells you what (h,k) is (if you don't remember) http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php

OpenStudy (anonymous):

i know h,k is going to be the vertex and a is going to be the stretch factor.

OpenStudy (anonymous):

y=2(x-10)^2+7 Is that right?

OpenStudy (phi):

if you were born on Oct 7

OpenStudy (phi):

to convert that to "standard form" y= ax^2 + bx + c where a, b and c are numbers you first multiply out (x-10)^2 = (x-10)(x-10) then multiply by the leading 2, and finally add in the 7

OpenStudy (anonymous):

can you write that in the equation tool.

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