WorksheetsVARIATIONS
Total questions: 10
Worksheet time: 5mins
The cost c varies directly as the number n of pencils is written as
c = kn
k = cn
n = k/c
c = k/n
Which is an example of a direct variation?
xy = 10
y = 2/x
y = 5x
2/y = x
y varies directly as x and y = 32 when x = 4. Find the constant of variation.
8
36
28
128
The speed r of a moving object is inversely proportional to the time t travelled is written as
r = kt
r = k/t
t = kr
r/k = r
If y varies directly as x and y = 12 when x = 4, find y when x = 12
3
4
36
48
A car travels a distance of d km in t hours. The formula that relates d to t is d = kt. What kind of variation is it?
Direct
Inverse
Joint
Combined
What happens to T when h is doubled in the equation T = 4h?
T is halved
T is tripled
T is doubled
T becomes zero
If y varies inversely as x, and y = 1/5 when x = 9, find y when x = -3.
5
1/3
3/5
-3/5
If 3 men can do a portion of a job in 8 days, how many men can do the same job in 6 days?
7
6
5
4
In a direct variation a variable k is a
(a)
