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
