WK4HW &acirc;€“ JO

# WK4HW &acirc;€“ JO - WK4HW JO Section 3.1 26 f(x =...

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WK4HW – JO Section 3.1 26. f(x) = x 2 – 2x a) f(4) = 4 2 – 2(4) = 16 – 8 = 8 b) f(-3) = (-3) 2 – 2(-3) = -9 + 6 = -3 c) f(2.7) = (2.7) 2 – 2(2.7) = 7.29 – 5.4 = 1.89 d) f(-4.9) = (-4.9) 2 – 2(-4.9) = -24.01 + 9.8 = -14.21 35. f(x) = 6-x a) f(p) = 6-p b) f(-r) = 6 – (-r) = 6 + r c) f(m+3) = 6 - (m + 3) = 6 – m – 3 = 3 – m

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41. f(x) = __ 3__ x – 1 a) = __ 3__ p – 1 (P 1) b) = __ 3_____ (-r) – 1 = __ 3_____ r + 1 (r -1) c) = __ 3_______ (m+3) – 1 = __ 3___ m+2 (m -2) 53. h(x) = .4018x 2 + 2.039x +50 1994 = 0 2000 = 6 2004 = 10 2008 = 14 a) x = 6 h(6) = .4018(6) 2 + 2.039(6) +50 = 14.4648 + 12.234 + 50 = 76.6988
x = 10 h(10) = .4018(10) 2 + 2.039(10) +50 = 40.18 + 20.39 +50 = 110.57 b) x = 14 h(14) = .4018(14) 2 + 2.039(14) +50 = 78.7528 + 28.546 +50 = 157.2988 Section 3.2 23. f(x) = 3 - 2x 2 x f(x) = 3-2x^2 -3 -15 -2 -5 -1 1 0 3 1 1 2 -5 3 -15

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25. h(x) = x 3 /10 + 2 x h(x) = x^3/10+2 -4 -4.4 -3 -0.7 -2 1.2 -1 1.9 0 2 1 2.1 2 2.8 3 4.7
33. This graph is a function b/c you would only have one point if you

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WK4HW &acirc;€“ JO - WK4HW JO Section 3.1 26 f(x =...

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