Add and subtract functions defined by equations Precalculus

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Course : Relations and functions
Exercise : Determine cartesian coordinates of points of the plan
Exercise : Determine the domain and range of a function defined by a graph
Exercise : Calculate the average rate of change of a function between two points using the equation of the function
Exercise : Find the x- and y- intercept of a function defined by a graph
Exercise : Compose two functions
Exercise : Find the inverse of a function