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lesson21outline - MA 153 Lesson 21 Outline Lesson 21...

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MA 153 Lesson 21 Outline Lesson 21 Section 3.4 (con’t) Functions Graphing Functions (1) Increasing As x gets bigger, y gets bigger also. What values of x make the y’s larger? Increasing on [ ] 1, 4 x y 1 4 2 5 (2) Decreasing As x gets bigger, y gets smaller. What values of x make the y’s smaller? Decreasing on [ ] x y 1 4 5 2 (3) Constant x y 1 4 As x gets bigger, y stays the same. What values of x make the y’s the same? Constant on [ ] 5 2
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Example: x y 4 x y 3 -1 Example: () 2 16 f xx =− x y (a) Graph f x . (b) Find on what intervals the graph is increasing, decreasing, and constant. (c) Find the domain and the range.
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Linear Function (Line) Instead of , we use ym xb =+ ( ) f xm = + for a linear function Example: Find the linear function given: ( ) ( ) 31 a n d 32 ff == Page 169 #67) An office unit is to contain 500 sq. ft. of floor space (see figure).
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This document was uploaded on 01/21/2012.

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lesson21outline - MA 153 Lesson 21 Outline Lesson 21...

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