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SAT Math 1.1 Statistics and Probability. In which of the following data sets are the arithmetic mean and the median equal?
SAT Math: Statistics and Probability Drill 1, Problem 2. If the four largest numbers in the set were doubled, what would happen to the median...
SAT Math 1.3 Statistics and Probability. Approximately what is the probability that they will be placed in alphabetical order?
SAT Math 11.4 Geometry and Measurement 211 Views
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Description:
SAT Math 11.4 Geometry and Measurement. What is the y-intercept of a line parallel to y – 2x = 4 and passing through the point (1, 2)?
Transcript
- 00:02
Here’s your shmoop du jour, brought to you by the y-intercept.
- 00:07
A close friend of the who-what-and-where-intercepts.
- 00:11
What is the y-intercept of a line parallel to y – 2x = 4 and passing through the point (1, 2)?
- 00:20
It’s time once again to unleash our inner Michelangelos.
- 00:24
Uh, yeah. More the artist, less the ninja turtle.
Full Transcript
- 00:28
So here’s our graph… and we want to figure out where a particular line is.
- 00:34
Well, we’re given the equation y – 2x = 4… but we need to get that thing into standard form.
- 00:39
y has to be all by its lonesome, here on the left… let’s add 2x to both sides.
- 00:46
y = 2x + 4. That's standard form.
- 00:51
If we plug in 0 for y… then x would work out to be -2. So let’s put a point at (-2,0).
- 01:00
If we plug in 0 for x… we get y equals 4. So… another point at (0,4).
- 01:09
And…here’s our line. Looks like for every one unit we move to the right,
- 01:16
we move up 2 units…
- 01:18
…so our slope is 2.
- 01:21
If we draw a parallel line that passes through (1,2)…
- 01:24
…then it will cross the y-intercept… at zero.
- 01:28
Problem solved!
- 01:40
Eh, no. We were thinking maybe just a champagne toast…
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