Question

let y varies directly as x. If y=12when x=4 ,then write a linear equation . what is the value of y when x = 5?

Answer 1

When y varies directly as x, the equation is of the form

y = kx, where k is constant of proportionality

Putting y = 12 and x = 4, we have

12 = k*4

k = 3

So. the required linear equation is y = 3x or y - 3x = 0


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