Write an equation of the line that passes through the points 0, -1 and 2,3

Step-by-step explanation:

When we are to find the equation of the line passing through two points, say

and we use two -point form.

The two point form is as follows:

Here, and

Therefore we have:

Multiplying by through out we get: .

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

d. vertex

step-by-step explanation: