Number 14 only. i really need on this.

rate of change is the distance divided by minute or whatever measurment your using that changes

-79.9/-18/8=4.25

130.9 is the total change of elevation and 19.125 is the total time of the dive so

130.9/19.125 =6.844repeating

I hope this helps you atleast understand rate of change.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

the first one, all those points on the line just make a strait line.