Alg 2 Unit 8: Lesson 4 More Variation

Alg 2 Unit 8: Lesson 4 More Variation

Because there is always more variation....

Multiple Choice

The volume of a cone (V) varies jointly with its height (h) and the square of its radius (r). If k is the constant of proportionality, which of the following equations represents the correct relationship between volume, radius, and height?

• $V=k\left(rh\right)^2$

• $V=\frac{kr^2}{h}$

• $V=\frac{k}{r^2h}$

• $V=kr^2h$

Multiple Choice

The image is an example of the graph of a(n)

• direct variation
• inverse variation
• neither
• both

Multiple Choice

Is the given table a direct variation? If so, what is the constant of variation?

• Yes; 1/3
• Yes; 3
• Yes; 5
• No

Multiple Choice

The equation 
xy =  25  represents:

• direct variation
• inverse variation
• joint variation
• none of these

Multiple Choice

The equation    
w = 10chs  represents:

• direct variation
• inverse variation
• joint variation
• none of these

Multiple Choice

15. If t varies inversely as squared of l, then we can write the equation as _________.

• A. t/l² = k

• B. l² = kt

• C. tl² = k

• D. none of the above

Multiple Choice

The frequency of a vibrating string varies inversely as its length. A string 3 feet long vibrates 175 cycles per

second. Find the frequency of a 5 foot string.

• 105 cycles

• 291.7 cycles

• 2625 cycles

• 332 cycles

Poll

How did you feel about today's lesson?

• Move over teach....I've got this!

• Good

• A little shaky

• I need some help at a help session