The amount of voltage, V volts, needed to send
a fixed amount of current through a wire, is directly
proportional to its resistance, R ohms. When R=6,
V=9.
Find an equation connecting V and R.
(ii) Find the value of V when R = 15.
(iii) Calculate the value of Rwhen V = 15.
(iv) Draw the graph of V against R.
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