Question

1)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.
f(x)= 1(x-11)^2+11

2)Using complete sentences, explain how to convert your birthday function into standard form.
Multiply (x-11) (x-11) use Foil
Distribute the 1
Combine like terms


3)Graph your function. Include your graph below.
i need help with this one

Answer 1

you are fine with getting the function in standard form ?

Answer 2

Yes

Answer 3

i did this
1 (x-11)2+11
(x-11)(x-11)
x2-22x+121
1( x2-22x+121 ) +11
1x2-22x+121+11
1x2-22x+132
am i right ?

Answer 4

yes

Answer 5

so im confused on how can i graph it

Answer 6

well its easier to graph it from the vertex form

firstly the coefficient of x^2 is positive so the graph opens upwards
these quadratic functions are parabolas and are symmetrical about a vertical line

Answer 7

for the general form
(x - b)^2 + c

x = b is the axis of symmetry and c is the the minimum value of the function

so here we have an axis symmetry x = 11 and minimum value of 11
so the graph is

Answer 8

so thats my x (11) how do i find y ?

Answer 9

y will be 11 9 the vertex):-

Answer 10

so it will be (11,9) ?