Graph this function.
f(x) = 2x – 8
Hint
A few points on this line include (0, -8), (2, -4), and (4, 0).
Answer
f(x) = 4x + 7
Some points on this line include (0, 7), (1, 11), and (-1, 3).
f(x) = 7
Some points on this line include (0, 7), (15930, 7), (-12121212, 7), and (9001, 7). Yes, we're serious.
f(x) = x – 5
Some points on this line include (0, -5), (3, -2), and (-2, -7).
Is this a function?
The vertical line test states that a vertical line will pass through a function only once at any spot.
Yes, it is.
Use the vertical line test to check.
No, it is not. It fails the vertical line test, because some vertical lines pass through it twice.
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