Find y when x=5, if y varies directly as x and y = 5 when x=3.5

Answer: 3.5

Step-by-step explanation:

In variation, and from the above question,

y ∞ x,

y = kx, where k is the constant of proportionality

first find the constant k

5 = 5k

Therefore

k = 1

Now to find y, substitute for k and x in the first equation above

y = kx

y = 1 x 3.5

y = 3.5