Explain the direct relation between exepenses and net profit ?

Expenses reduce Net Profit

In a business entity  you can make net profit only by incurring certain expenses.

Increase in expenses leads to increase in Net Profit (profit after tax)

if expense increase net profit will decrease 

if expenses decrease net profit will be increase 

the relation is negative 

I agree with all the answers

agree with mr sleem khatri 

Inverse relation

Expenses reduce Net Profit

agreed with gentlemen