1. Assignment:
1-->Set 48 (evens) - Due Monday (1/9)
2-->Test #6 signed for extra credit
3-->Test #7 - Thursday (1/19)
1

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
2

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
3

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)]
4

5. Examples (Lesson 47):
pg. 323
A)
B)
5

6. C)
D)
6

7. E)
F)
7