Relations and Functions : Graphs

Do the set of points in the figure represent a function? Dots going up 1 2 3 4

No

Do the set of points in the figure represent a function? (1,2) , (2,1) , (3,0) , (4,-1)

Yes

If K = {(x, y) | x - y = 5}, is Set K a function?

Yes

For K = {(x, y) | x - y = 5}, and the domain of x = 0, 2, 4

(0,-5) , (2,-3) , (4,-1)

Use the graph of the function to evaluate f(2).

2

If K = {(x, y)|x - y = 5}, find the corresponding range of y for the domain {0, 2, 4}.

{-5, -3, -1} or {0, 2, 4}