Question

What is the value of k in y = kx, if y = 12 when x = 24?

Answer 1

Answer:

k = 0.5

Step-by-step explanation:

Substitue y = 12, x = 24 into y = kx.

12 = k × 24

24k = 12

k = 12 ÷ 24

k = 0.5 (final answer)

Answer 2

Answer:

the value of k is

k = 1/2

Step-by-step explanation:

from the question y = kx,

where y = 12 and x = 24

we will first of all make k the subject of the formula

y = kx

divide both sides by the coeficient of k which is x

y/x = kx/x

y/x = k .................................. k is the constatnt of proportionality

since we are given the value of x and y , we slot it in to determine the value of k.

k = y/x

k = 12/24

k = 1/2

check if your answer is correct , put the value of k into te question and see if LHS = RHS

y = kx

12 = 1/2 × 24

12  = 24/2

12 = 12....................... PROVED