1. 10/9/14: Section 3. 4 (not on Quiz tomorrow)
10/9/14: Section 3.4 (not on Quiz tomorrow) Groups: 9, 10, 19, 20, 24, Quiz Tomorrow HW: Assignment #24

2. 3.4 Linear Functions & Direct Variation
DO NOW: Are the values in the table linearly related? Does y vary directly as x? 1. 2. X y 3 17 4 21 5 25 6 29 x
f(x) 8
-32 -5 20

3. Direct Variation y = kx Where “k” is the constant of variation.
What is another name for “k”?

4. Direct Variation - Proportion
The number of calories burned on the elliptical machine is directly proportional to the miles lapsed. If Mrs. Vida burns 360 calories for every 3 miles, how many calories would she burn in 5 miles on the elliptical machine?

5. Is that enough to eat 4 Oreos before bed?
If calories consumed is directly proportional to Oreos eaten (160 calories for 1 serving or 3 cookies), how many calories are consumed if 4 Oreos are eaten?

6. Domain and Range
Find the Domain and Range of each. 1. (0, 2), ( 3, 5), (6, 9) 2. y =3x

7. Decide which of the following are linearly related.
1. Circumference and radius of a circle
2. Area and radius of a circle
3. Perimeter and side of a square
4. Area and side of a square
5. Distance traveled and time spent traveling (if speed is constant)