What is the constant of proportionality of y=3x?

1 Answer
May 1, 2018

3

Explanation:

In lines such as y=14x, y=x, and so on, the y values are a result of the constant of proportionality being multiplied by the x value.

y results from something being multiplied by x, and the values are always proportional to one another.

y=3x Some points on this line would be (1,3),(2,6),(3,9)

Notice that putting these points into a ratio of x-value to y-value results in 1:3 as a simplified version.

So, the constant of proportionality is what x is being multiplied by to get y. In this case, it is 3.