Question

The tables show some input and output values:


Table A
Input Output
1 7
2 7
2 9
4 5
Table B
Input Output
6 1
7 3
8 2
9 5









Which tables represent functions?
Only A
Only B
Both A and B
Neither A nor B

Answer 1

only B

Answer 2

thanks

Answer 3

welcom

Answer 4

Only B. Look at table A. There are two y-values (7 and 9) for x-value 2. That means the function of table A doesn't pass what's called the vertical line test.