Athermostat control with dial markings from 0 to 200 is used to regulate the temperature of an oil bath a calibration plot on logarithmic coordinates of the temperature (of) versus the dial setting r is a straight line that passes through the points (r1= 5.00, t1 = 110.0 °f) and (r2=45.0, t2=250.0 °f) a. in the equation t(of) = arb, what are the values of a and b? a = of b = b. estimate the thermostat setting need to obtain a temperature of 320.0°f r = c. estimate the thermostat setting needed to obtain a temperature of 120.0°c r