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Standard VII
Physics
Distance-Time Graph
Question

When a graph between two physical quantities is a straight line, the two quantities are
  1. Both constant
  2. Independent of each other
  3. Directly proportional
  4. Inversely proportional

A
Directly proportional
B
Inversely proportional
C
Both constant
D
Independent of each other
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Solution
Verified by Toppr

As we know the equation of a straight line is Y=mX+C
Let us assume X and Y are two different physical quantity and C is any constant. and the graph between them is straight line.
According to above equation,
Y∝X
Hence, X and Y are Directly proportional.
Option C

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