Evaluate f(x) = mx + b

What this lesson shows

f(x) = 3x + 2. Evaluate it at 0, at 1, and at 2. One machine… three inputs. Same moves every time.

Try it yourself

Real questions from this lesson's worksheets — answers below each one.

1. f(x) = 2x + 1. Find f(2)
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   5
2. f(x) = 2x + 1. Find f(1)
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   3
3. f(x) = 3x + 1. Find f(2)
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   7
4. f(x) = 2x + 2. Find f(1)
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   4