Jack measured 1 amp as the total current in a certain circuit when he applied 20 volts to the circuit. When he applied 60 volts, he got a measurement of 3 amps. Write a linear equation describing the relation between voltage and current and calculate the total current when 50 volts are applied to the circuit
A. C=(20) v; 2.5 amps
B. C=(20) v: 1.5 amps
C. C=() V; 2.5 amps
D. C=(a) v. 3.5 amps