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Quadratic Functions Videos 7 videos
GED Math: Graphs and Functions Drill 5, Problem 5. What is the value of a?
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.
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
Full Transcript
- 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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