Question 10,11,12 dmdmdmmd d s smsmsmkskwkwkw

NOTES:

Domain is: all the x-values

Range is: all the y-values

Function is: no duplicate x-values

10)

D: {11, 12, 13, 15, 16}

R: {7, 8, 10, 10.5, 11}

This is NOT a function because there are 2 different y-values when x = 15.

11) y = 50x + 75

f(1) = 50(1) + 75   = 125

f(2) = 50(2) + 75   = 175

f(3) = 50(3) + 75   = 225

f(4) = 50(4) + 75   = 275

    x     |     y

    1     |     125

    2     |     175

    3     |     225

    4     |     275

12) {(4, 1), (8, 1), (8, 2), (12, 2), (12, 3), (16, 4), (20, 3)}

D: {4, 8, 12, 16, 20}

R: {1, 2, 3, 4}

This is NOT a function because there are 2 different y-values when x = 8.        It also fails when x = 12