Question
The constant of proportionality, in the equation 5 apples @ $2.5 is
- 1
- 0.5
- 1.5
- 0.25
Hint:
Constant of proportionality is the same as the slope of a straight line passing through the origin. Using the formula m= 
we can find the value of slope or constant of proportionality. Here, we have to find the constant of proportionality of the given linear equation using the given information in the question.
The correct answer is: 0.5
In the question it is given that the price of 5 apples is $ 2.5.
We have to find the value of constant of proportionality.
Here, according to the question x= 5 and y= 2.5.
Constant of proportionality=m= ....................(1)
Put the value of x and y in eq. 1.
So, the constant of proportionality is 0.5.
Therefore, the correct option is b, i.e., 0.5.
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