Question

every 6 months price of petrol increases at the rate of Rs 7 per litre taking price of petrol in December 2011 as X in December 2012 as y from a linear equation showing amount spent on petrol in December 2012​

Answer 1

Answer:

A linear equation is of the form:

y = mx + c

y = dependent variable

x = independent variable

m = rate

c = constant

In this case:

y = present price of petrol

x = Number of years = 1

m = Rs.4 per litre

c = x, price of petrol in December, 2011

Therefore:

y = 4(1) + x

y = x + 4