Find an equation of variation in which y varies directly as x and y=18 when x=9. Then find the value of y when x= 16.
2 answers
I think it’s y=2x and y is 32 when x=16 am I right
y varies directly as x ----> y = kx
given: when y = 18 then x = 9
18 = 9k
k = 18/9 = 2
so y = 2x
so when x = 16, y = 2(16) = 32
you are right!
given: when y = 18 then x = 9
18 = 9k
k = 18/9 = 2
so y = 2x
so when x = 16, y = 2(16) = 32
you are right!