Linear Equations I

Hong Kong

Stage 4 - Stage 5

If $y$`y` varies inversely with $x$`x` we write the equation:

$y=x^k$`y`=`x``k`

A

$y=x+k$`y`=`x`+`k`

B

$y=kx$`y`=`k``x`

C

$y=\frac{k}{x}$`y`=`k``x`

D

Easy

Less than a minute

Is the variation relating the distance between two locations on a map and the actual distance between the two locations an example of a direct variation or an inverse variation?

Is the variation relating the number of workers hired to build a house and the time required to build the house an example of a direct variation or an inverse variation?

Is the variation relating the time it takes an ice cube to melt in water and the temperature of the water an example of a direct variation or an inverse variation?

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