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Evaluating Functions. Functional Notation. f(x) = 2x + 15 Means …. The function in terms of x is … f(x) replaces the y …. Instead of x = _____ …. f(x) = 2x +7, find f(3) Example … f(x)=5x+2, find f(-5). More Examples. f(x) = 2x² +8x +16, find f(2) f(x) = 4x + 18, find f(-8)
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Functional Notation • f(x) = 2x + 15 • Means …. The function in terms of x is … • f(x) replaces the y …
Instead of x = _____ … • f(x) = 2x +7, find f(3) • Example … f(x)=5x+2, find f(-5)
More Examples • f(x) = 2x² +8x +16, find f(2) • f(x) = 4x + 18, find f(-8) • f(x) = 3^x – 16, find f(5)
Final Examples • f(x) = 8x -20, find f(x+4) • f(x) = 16x² + 42x, find (x-2)