as long as each x value appears only once, it is probably a function. So, I'd pick A and B on that basis.
D also works. While 0 appears twice as the first element, the 2nd element is the same. So, the pair (0,3) appears twice, but it does not violate the rules for functions.
Which of the following pairs could represent a function? Select three that apply.
A: {(2,-5),(4,-5), (6,2), (8,3)}**
B: {(-1,5),(3,5),(6,5), (9,5)}**
C: {(3,-4),(5,2), (3,8), (6,7)}
D: {(0,3), (4,2),(-1,7), (0,3)}
E: {(-1,1),(-1,6),(-1,8), (-1,0)}
F: {(-4, 2),(3,-2), (-4,-2), (5,1)}
We are supposed to select three that are correct, but I've only figured out 2 so far. Can anyone help me figure out the third one? Thanks in advance.
3 answers
^^ simple version of what steve said:
even tho the x-value "0" appears twice, it doesn't count because it has the same y-value, so they overlap each other.
so if you were to graph it, you would only see 3 points, even tho there are really 4.
even tho the x-value "0" appears twice, it doesn't count because it has the same y-value, so they overlap each other.
so if you were to graph it, you would only see 3 points, even tho there are really 4.
Ans: A, B, and D. I just did it. Thank you steve and Honors student. They have correct and. with the correct explanation.
1 answer