50 points ! will mark branliest

find the constant of proportionality for the graph and write in the form y = kx.
a) y = 1 /6 x
b) y = 6x
c) y = 7x
d) y = 42x

Y would be the output value after inputting an X value and solving the necessary equation.

On the pictured graph, the numbers along the bottom are the X values and the numbers along the side are the Y values.

Looking at where the yellow dots are located on the X axis, there ia a dot at 0, 7, 14, 21, 28 and 35.

Now look at the corresponding Y values for each of those dots, they are at 0, 42, 84, 126, 168 and 210. 

To find the proportionality of the graph using the equation y =kx, we can fill in the Y and X values and solve for k.

using x = 7 and Y = 42, the equation becomes 42 =k(7).
 To solve for k divide both sides by 7: k = 42/7 = 6
When you replace the x and Y with the other numbers on the graph k is also equal to 6, so the correct equation would be B. y = 6x