Q1. Following are the car parking charges near a railway station upto
4 hours Rs. 60
8 hours Rs.100
12 hours Rs. 140
24 hours Rs.180
Check if the parking charges are in direct proportion to the parking time.
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Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
We say that x and y are in direct proportion, if
or 
Hence in the given problem we have,
Charges for the parking :
considering x to be charged to be paid and y to be the parking time.
Then we calculate
,
For:- 4 hours:
8 hours : 
12 hours :
24 hours: 
Clearly
is not equal to some constant 'k', then we can say that
Parking charges are not in direct proportion to parking time.