A ranch hand herded his cattle to some grazing land. Then he began riding back to the ranch, which is due west, at 5 kilometres per hour. Simultaneously, the cows began moving away
from him, too, headed due east at 3 kilometres per hour. How long did it take for the herd
and the ranch hand to be 5 kilometres apart?

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

step-by-step explanation:

the answer is 128