Inverse Rational Functions

What is the x-intercept of this rational function?

• (-9, 0)

• (0, 0)

• (4, 0)

• (2, 0)

Does this table represent an inverse variation?

• Yes

• No

Does this table represent an inverse variation?

• Yes

• No

Given that y varies inversely with x, if x =7 and y = 4, what is y when x = 2?

• 14

• 10

• 2

• -14

An ​ (a)   takes a previously found result ( a y value) and returns it to its original value (x value). This means you are ​ (b)   a function

• function

• inverse

• 2 or more

• undoing

Does the equation show an inverse variation? 
y=10/x

• yes

• no

Given the following equation, identify the constant k.
y = 54/x

• There is one.

• k = x

• 54

• y = k

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

Does the table show an inverse variation?

• Yes

• No

The number of men needed to dig a hole varies inversely with the time it takes to dig a hole. If 12 men can dig a hole in 8 days, then how many men can dig it in 6 days?

• 14 men

• 16 men

• 18 men

• 20 men