FUNCTIONS,+COMPOSITION+OF+FUNCTIONS

A Function is a correspondence between two sets, D and R, that assigns to each member of D exactly one member of R. D = Domain, R = Range. Example: F:12x+4

A. f(10) B. f (-3) To get the answer you just replace x with 10 (12)(10) + 4 120+4 -32 124 F: 5x-1 G: 2+(x) squared A. g(f(3)) when given a problem like this you first find the answer in the f equation because it is inside of the (3)(5)-1 15-1 14 the substitute 14 in for x in the g 2+(14)(14) 196+2 198 B.[f o g] (0) this means the same as f(g(0)) 2+(0)(0) 2 (5)(2)-1 10-1 9 State the Range of H: l 2x+1 l if D = {-2,-1,0,1,2} Sub each # of the domain in for x and state the answer R={3,1,1,3,5} with the range only state each # once if it repeats R={3,1,5}

When a grid is shown and you are told to give the domain and range for the domain you list D = all the #'s on the x axis and for Range all the #'s on the y axis

Imagine points are on (-3,3) (0,-1) (1,1) (-1,1)

D={-3,-1,0,1} R={-1,1,3}



 