Question

Following are the car parking charges near a railway Station upto
4 hrs = ₹60
8 hrs = ₹ 100
12 hrs = ₹ 140
24 hrs = ₹ 180
check if the parking charges are in direct proportion to the parking time

Answer 1

To check the direct proportion we will find out ratios of the parking charge and parking time all together

Lets take first two cases

$\frac{60}{4}=15$ rupees per hour

$\frac{100}{8}=12.5$ rupees per hour

so both ratios are not same, hence they are not in direct proportion.

And, last 2 cases

$\frac{140}{12}=11.66$ rupees per hour

$\frac{180}{24}=7.5$ rupees per hour.

Here also ratios are different.

So parking charges are not in direct proportion to the parking time.