College Algebra / Unit 6 Alg 312 short lesson, about 20 seconds
The Zero of a Linear Function
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The idea
The zero of a linear function is the input where the output is 0, found by solving f(x) = 0; a nonconstant linear function has exactly one.
In practice
A profit model P(x) = 3x − 6 zeroes at x = 2 — the break-even point, where losses hand off to gains.
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