4. Estimate an equation for the line of best fit for the following scatter plot. Post High School
Education and Salary
Beginning annual
salary (S 1000s)
70 +
60 +
50
40
30
20
10
1 2 3 4 5 6 7
Time (years)

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

can i see the following ?

step-by-step explanation: