The points where a graph crosses the x-x\text{-} and y-y\text{-}axes are called the x-x\text{-}intercept and y-y\text{-}intercept, respectively.

Sometimes, only one coordinate of these points is referenced. For example, since the x-x\text{-}intercept lies at (a,0),(a,0), it can be said that x=a.x=a. The same is true for the y-y\text{-}intercept (0,b),(0,b), y=b.y=b. A relation can have several intercepts; a function can have multiple x-x\text{-}intercepts, but it can only have one y-y\text{-}intercept.

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