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Accurate estimate for the intercept? For the slope?

Two scientists want to measure the resistivity, R(T), of a material as a function of temperature. They assume that R(T) = a1+a2T, where a1 and a2 are the constants to be determined. The first scientist measures R for temperatures T = 0°, 10°, 20°, ..., 100°. The second performs the measurement at T = 0°, 100°, ..., 400°. Assuming that they use the same instruments and that the measurement error is constant, which scientist will obtain the more accurate estimate for the intercept? For the slope?

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This solution explains how to measure the resistivity.

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