WEBVTT
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Now you may not have heard the term constant function before,
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but intuitively we think that this is a function that has a constant value, at all values of the input.
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That's what graph A is.
It's of the form y equals some constant, c, let's say.
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Actually in this case it looks more like 3,
so we'll just write that.
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Linear functions you recognize.
It's graph C right here.
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The quadratic function is the parabola, graph F.
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The absolute value function, which you saw in a problem set earlier in the course, is graph B.
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The cubic function is graph D.
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And the square root function is graph E.
Now you may not have seen this graph before either.
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But as always, you can test points picking values of x
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and then plugging them into the function to figure what the y coordinate should be.
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The graph of this function is
y equals the square root of x.
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So if x equals 0, y equals 0.
If x equals 1, y equals 1.
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And we can see that moving further over,
if x equals 5, y equals just over 2.