Question

Y varies directly with square root of X. Y=3 when X=4. find Y when X=1

Answer 1

"Y varies directly with square root of X" ---> y = k√x , where k is a constant

given: y=3, x=4
3 = k(√4)
k = 3/2

y = (3/2)√x
when x=1
y = (3/2)√1 = 3/2