CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
Observe the following table where x and y are directly proportional.
x → |
20 |
17 |
(ii) P_{1} |
y → |
(i) P_{1} |
34 |
30 |
Find the unknown quantities.
Let there be two values of x be x_{1} and x_{2} such that two values of y as y_{1} and y_{2} respectively equal to x_{1} and x_{2}, then x and y are said to vary in inverse proportion, if:
A.
If the following quantities vary directly, then what is the value of y?
y | 5 |
8 | 20 |
y = 20
y = 2
y = 4
B.
y = 2
If the following quantities vary directly, then what is the value of x?
1 | 4 |
7 | x |
x = 4
x = 7
x = 28
A.
x = 4
In a direct proportion, two quantities x and y vary with each other such that:
xy remains constant
A.