Suppose that 15 inches of wire costs 45 cents. At the same rate, how much (in cents) will 43 inches of wire cost?

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

step-by-step explanation:

8 2/3 is the answer

step-by-step explanation: just use a calculator

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2