The cost of a computer processor is directly proportional to its speed. A 4GHz processor costs £400.

Find the cost of a 6GHz processor

Step-by-step 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

if x decreases by 4 then y increases by 10

step-by-step explanation:

step-by-step explanation:

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