Question

if y varies directly as x and y=49 when x=7 what is the value of y when x=3

Answer 1

We can also write
y = 7x
So if x = 3 , then y = 21

Answer 2

thanks hyuna iI did pick the right answer

Answer 3

y varies directly with x means that y is directly proportional to x that is\[y \alpha x\]
when you remove the directly proportional sign a constant k is added which means
\[y=kx\]

Answer 4

so y=49 and x =7 means 49/7=k which is k=7 so
y=7x now u can plug in the values to get your answer :)