Question
Matt solved 90 problems in 6 hours, then the slope of the linear equation is
- 540
- 15
- 96
- 84
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: 15
In the question it is given that Matt solved 90 problems in 6 hours.
We have to find the slope of the linear equation.
Here, x= time in hours and y= number of problems
So, x= 6 and y= 90.
Slope=m= ....................(1)
Put the value of x and y in eq. 1.
Thus, the slope of the linear equation is 15.
Therefore, the correct option is b, i.e., 15.
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