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Derivatives and Graphs
Section 12.1 Derivatives and Graphs Copyright ©2011 Pearson Education, Inc. All right reserved.
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Increasing (-7,-4) (-2,3) Decreasing (-∞,-7) (-4,-2) (3,∞)
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Positive slope – function is increasing
Negative slope – function is decreasing
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f(x) increasing decreasing increasing
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Copyright ©2011 Pearson Education, Inc. All right reserved.
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x = 0 is the only critical point
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x = -3, 4 are critical points
Now choose test points in the three intervals (-∞,-3), (-3,4), (4,∞)
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12.1 # 9, 19, 21, 30, 35
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Copyright ©2011 Pearson Education, Inc. All right reserved.
Section 12.2 The Second Derivative Copyright ©2011 Pearson Education, Inc. All right reserved.
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Price of a stock in month x is given by f(x)
Derivative f’(x) – when price is incr/decr Derivative of f’(x) – rate of incr/decr
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Since both functions are always positive, both functions are increasing for x > 0
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Stock A is increasing at a decreasing rate
Stock B is increasing at an increasing rate
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s(t) – position of an object at time t
v(t) = s’(t) – velocity at time t a(t) = s’’(t) – acceleration at time t
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t must be positive, therefore the object stops in 7/3 seconds.
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Copyright ©2011 Pearson Education, Inc. All right reserved.
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