Need help on #2b 2 The cost per hour of running a freight train is given by C(u) = 100 +
where v is the average speed of the train.
b Find the rate of change in the cost of running the train at speeds of:
i
10 kmph
li 6 kmph

i think the correct option is the second option.

a

step-by-step explanation:

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)