Question

How do I find out if it is proportional or not?

Answer 1

To see if multiple ratios are proportional, you could write them as fractions, reduce them, and compare them. If the reduced fractions are all the same, then you have proportional ratios.

Explanation:

Answer 2

they are proportional

Explanation:

to find if they are proportional, we will take x/y ratios and compare several of them, it will tell us if they are proportional or not and give us the constant of proportionality

x1/y1 = 21/3 = 7/1

x2 / y2 = 70 / 10 = 7 / 1

x3 / y3 = 49 /7 = 7 / 1

Since the x/y ration does not change, they are proportional, which means that whatever the value of y, the value of x will be y multiplied by the constant of proportionality

and the constant of proportionality is 7