Question

If y varies inversely as x, find the constant of variation if y = 5 when x = -1.

a) -5

b) 5

c) -2

d) 2

Answer 1

(a) - 5

since y varies inversely as x then k = yx ( k is the constant of variation )

using y = 5 when x = - 1, then k = 5 × - 1 = - 5