X+ y = k 2x + 3y = k + 1 the point of intersection of the lines has an x-coordinate of
a) 2k + 1
b) -2k + 1
c) 2k - 1

it is 2k+1 k+k+1=2k+1

Step-by-step explanation:

k+k+1=2k+1

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