2. Lesson 47 Warm-Up:
1) Simplify: 5(x - 3) + 2(3 - x)
2) Find the surface area of a plastic CD case
with dimensions 12 cm by 12.5 cm by 0.3 cm.
3) Combine like terms: x3 + 2x2y - 3xy2 - x2y
4) Express 1/12 as a percent.
5) Find the hypotenuse:
(to the nearest whole #)
4 cm
8 cm
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3. Lesson 47:
*domain – set of inputs (x values)
*range – set of outputs (y values)
*step function – a type of function whose graph has a
stair step pattern - pg. 320
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4. *continuous function - a type of function whose graph is not
interrupted with gaps - pg. 321
*direct proportion - a type of function whose graph is linear,
includes the origin, and has a positive slope - sometimes also
known as direct variation
[forms a line]
[goes through (0, 0)]
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