U3 L1: Inverse Variation
A tour group charges a flat price for a tour of up to 20 people. The cost per person varies inversely with the number of people. If five people must pay $135 each, what must 15 people pay per person?
$45
Suppose that r varies directly with s and inversely with t, and r=2 when s=3 and t=12. What is the value of r when s=5 and t=4?
10
Designer Dolls, Inc., found that the number N of dolls sold varies directly with their advertising budget A and inversely with the price P of each doll. The company sold 1,800 dolls when $34,000 was spent on advertising and the price of a doll was set at $25. Determine the number of dolls sold when the amount spent on advertising is increased to $42,000. Round to the nearest whole number.
2,224 dolls
Which equation shows that m varies directly with p?
m = p/3
Suppose that x and y vary inversely and that x=2 when y=8. Write the function that models the inverse variation.
y = 16/x