Explain how you can find the constant of proportionality from a graph representing a proportional relationship when it shows a point with an x-value of 1 and if it doesn’t show an x-value of 1.

Answer:

When the x-value is 1 , the y-value is the constant of proportionality. If there isn’t an x-value of 1, choose another point and divide the y-value by the x-value to find the constant of proportionality.