Question

Let x varies directly as y. If x= 14 when y = 7, then write a linear equation. What is the value of x, when y = 8?​

Answer 1

x = 16

Explanation:

given x varies directly as y then the equation relating them is

x = ky ← k is the constant of variation

to find k use the condition x = 14 when y = 7

14 = 7k ( divide both sides by 7 )

2 = k

x = 2y ← linear equation

when y = 8 , then

x = 2 × 8 = 16