Question

Let y varies directly as x if y = 12 for x = 4 then write and linear equation what is the value of y when x = 5

Answer 1

y = mx------------(1)
m is constant
12=m×4
= 12/4= m
m=3
put m=3 in equ 1st
y=mx
y=3×5------------(x=5)
y=15

Answer 2

Answer:

y = mx------------(1)

m is constant  

12=m×4

= 12/4= m

m=3

put m=3 in equ 1st

y=mx

y=3×5------------(x=5)

y=15

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