What is budget line?

A budget line is a graphical representation of the different combinations of two goods that a consumer can purchase with a given income and prices of the goods. It shows the maximum quantity of one good that can be purchased given the quantity of the other good that is purchased. The budget line is typically represented as a straight line on a graph, with the two goods on the x and y axes. The slope of the budget line represents the relative prices of the two goods.