Find the domain and range of the relation and determine whether it is a function

a: domain: {-4,-1,1,4}; range: {-1,1,4}; yes the relation is a function
b: domain: {-4,-1,1,4}; range: {-1,1,4}; no the relation isn't a funciton
c: domain: {-1, 1, 4}; range: {-4,-1, 1, 4}; yes the relation is a funciton
d: domain: {-1, 1, 4: ; range: {-4, -1, 1, 4}; no the relation isn't a function

The domain is going to be all ur x values...so the domain is { -4,-1,1,4 }the range will be all ur y values...so the range is { -1,1,4} ...the reason there is only 3 numbers is because if the numbers repeat, u only have to write them once.

A function will not have any repeating x valuesthey can have repeating y values, just not the x ones. So if all ur x values are different, then it is a function. Therefore, this is a function.

X= 2 he can buy 2 packs of cards for $12 and an action figure for $3 so he would spend $15 in total plus the free poster