contestada

The table is an example of joint variation. What is the missing value of y?

x 4 5 6 7
y 12 9 15 ?
z 48 45 90 63

Respuesta :

The answer is 9.
4 times 12=48
5 times 9=45
6 times 15=90
7times?=63
Working backwards,63 divided by 7=9