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Basic Algebra Videos 43 videos
ACT Math: Pre-Algebra Drill 2, Problem 3. Which of the following numbers is smallest?
ACT Math: Pre-Algebra Drill 2, Problem 4. Which of the following numbers is largest?
SAT Math: Algebra and Functions Drill 1, Problem 2. Based on the data in the table, what is the maximum heart rate for the average 22-year-old?
GED Math 2.3 Graphs and Functions 473 Views
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Description:
GED Math 2.3 Graphs and Functions. Find the equation of the line.
Transcript
- 00:00
Thank you We sneak in and here's your shmoop du
- 00:05
jour brought to you by lines that passed through points
- 00:08
They never just stop and stay awhile Such rolling stones
- 00:12
a line passes through points to a negative a and
- 00:15
a for a bind the equation of the line And
Full Transcript
- 00:19
here the fence line Okay well we should know by
- 00:25
now that if we're given a couple of points and
- 00:27
want to find the equation of line we're gonna have
- 00:29
to figure out the slope Yeah So let's hop onto
- 00:33
our little deal and take her for a spin All
- 00:35
right our slope formula is why two minus y one
- 00:38
over x to minus x one though And yeah this
- 00:43
is our y two and start y one r x
- 00:46
to x one Gonna plug everything in and we get
- 00:49
for a minus Negative a over a minus two eh
- 00:54
Two minus signs become positive leaving us with four a
- 00:57
plus a on the top or by day And we've
- 00:59
got a negative a on the bottom Well and a
- 01:03
cancels out from top and bottom And we're left with
- 01:07
negative five which is our slope Well great but we're
- 01:10
not quite finished We need the entire equation So time
- 01:12
to pull a little point Slope formula out of our
- 01:15
bag of tricks Second coordinate looks a little prettier No
- 01:18
negatives So let's use that one lugging these coordinates in
- 01:21
two point slope formula we get why Minus for a
- 01:26
equals negative five times The quantity x minus a distributing
- 01:31
that second part we get why money for a equals
- 01:34
minus five x plus five eh And then we can
- 01:37
add for eight of both sides Tow wind up with
- 01:39
why equals negative five x plus nine a which is
- 01:42
option c Nice work time to park the flip mobile 00:01:45.483 --> [endTime] back in the slip gave way
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