Warm Up 04.15.13Week 5

Solve if x = 6, and 4:

Does x=6 make the answer larger or smaller than x=4?

Section 11.3 Day

1

I will use direct and inverse variation.

Direct Variation

k ≠ 0

Inverse Variation

k ≠ 0

Ex 1

Direct Variation Inverse Variation

22

Write an equation:

Inverse Variation

x y1

2

3

4

Ex 2

Direct Variationy = 2x

x y1

2

3

4

2

4

6

8

8

4

2

Ex 3 y varies directly with x:

Ex 4 Write an equation that varies inversely :

Assignment: Handout – 11.3 Day 1 “MUST DO WORD PROBLEMS”

Check 1: Does the graph show direct, inverse or no variation?

a) b) c)

Re 1

Blue

( 5 + 5 )( 5 + 7 + 5 )

Yellow

Total Area (Base)

( 10 )( 17 )

170

170 – 50

25 25

120170

0.706

70.6%

170 – 120

50170

0.294

29.4%