0ut of 30 litres of milk, bought for rs 15.50 per litre ,4 litres are lost by leakage. what is gained by selling the remainder at rs 20 per litre.

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

I’m really confused and need your assist me with this question i’ve never been taught

How can i differentiate this equation?