Write expression using a positive exponent< br />
14. 4⁻¹< br />
15.5⁻³< br />
16. -6⁻²< br />
17 -3⁻³< br />
18 3⁻⁵< br />
19 10⁻⁴< br />
20 p⁻¹< br />
21 a⁻¹⁰< br />
22. d⁻³< br />
23 q⁻⁴< br />
24. b⁻¹⁵< br />
25 r⁻²⁰

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