12. A bird is flying 23 ft above sea level while a dolphin follows the bird from 5 ft below sea level. Which equation shows the correct calculation for the
distance between the bird and the dolphin?

23-5=18

Step-by-step explanation:

ok so 23 feet above would be positive 23 but 5 ft below would be negitive so you write 23-5 and then solve

  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.