Question

The cost of a computer processor is directly proportional to its speed.

A 4GHz processor costs £400.

Find the cost of a 6GHz processor

Answer 1

Explanation:

If cost is directly proportional to speed, then the equation for this is

£ = ks, where k is the constant of proportionality. We need to solve for this first.

400 = k4 so

100 = k. Now we will use that k value in the next equation to find the cost of a 6GHz processor:

£ = (100)(6) so

£ = 600