Question

find the equation of variation and solve for the value of k when y varies directly as x when y = 30 when x = 8​

Answer 1

Answer:

15x-4y=0

Step-by-step explanation:

y varies directly as x means, y is directly proportional to x.

I.e., the equation of variation is y=mx. --> m=y/x

from the given values, y=30 when x=8

-> therefore, m=30/8 =15/4

hence, the equation of variation is y=(15/4)x --> 4y = 15x

it can also be written as, 15x - 4y = 0