Relations and Functions : Graphs
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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}