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Linear Functions Videos 7 videos

GED Math 2.5 Graphs and Functions
227 Views

In this GED math problem, find the vertical intercept of a given function.

Comparing Axes of Symmetry
286 Views

GED Math 3.3 Graphs and Functions. Compare function A's axis of symmetry to function B's axis of symmetry.

GED Math 3.5 Graphs and Functions
309 Views

GED Math: Graphs and Functions Drill 3, Problem 5. What is the negative root of the quadratic function?

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Comparing Axes of Symmetry 286 Views


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Description:

GED Math 3.3 Graphs and Functions. Compare function A's axis of symmetry to function B's axis of symmetry.

Language:
English Language

Transcript

00:00

Thank you We sneak in and here's your smoke too

00:05

Sure brought to you by symmetry It's really bugging us

00:08

that the word is in a palindrome Quadratic function is

00:11

shown in the graph below Quadratic function b has the

00:14

equation f of x equals x squared plus five x

00:16

plus six function a's axis of symmetry is blank function

00:21

bees access of symmetry Well it's dropped down time and

00:26

there isn't even a fire We have three possible answers

00:29

in our little drop down thing here left of right

00:31

of and same at well we're told that the graph

00:33

is showing quadratic function a and then we're given the

00:36

equation for a quadratic function B it's up to us

00:39

to figure out what relation the two axes of symmetry

00:42

have to one another you can't cheat but check that

00:44

paternity record well for starters operable its axis of symmetry

00:49

It's this vertical line that passes through its centre in

00:53

the case of quadratic function a it'd be this line

00:56

right here x equals two point five to find these

00:59

axes of symmetry Well we're going to need to plug

01:01

in Chuck We used the equation X equals negative b

01:04

over two A where is the coefficient of the x

01:08

squared term And b is the coefficient of the extra

01:11

In the equation given to us we've got an x

01:13

squared coefficient of one and an ex coefficient of five

01:17

Well that's going to give us x equals negative five

01:20

over two times one or negative five half So what

01:24

does that tell us Well we don't care about the

01:26

numbers so much as we care about the negative that's

01:29

What tells us a cz access of symmetry is to

01:32

the right of bees We have our answer by the

01:35

way you have a rather lovely axes of symmetry yourself 00:01:38.138 --> [endTime] there if you don't mind my saying so

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