As we all know that a relation is a cor- respondence between two variables x and y. When relations are written as ordered pairs (x,y),we say that x is related to y.Often, we are interested in specifying the type of re...As we all know that a relation is a cor- respondence between two variables x and y. When relations are written as ordered pairs (x,y),we say that x is related to y.Often, we are interested in specifying the type of re- lation (such as an equation) that might exist between the two variables. For example,the relation between the revenue R resulting from the sale of x展开更多
文摘As we all know that a relation is a cor- respondence between two variables x and y. When relations are written as ordered pairs (x,y),we say that x is related to y.Often, we are interested in specifying the type of re- lation (such as an equation) that might exist between the two variables. For example,the relation between the revenue R resulting from the sale of x