A thermistor is a temperature-sensing element composed of a semiconductor material, which exhibits a large change in resistance proportional to a small change in temperature. A particular thermistor has a resistance of \(5 \mathrm{k} \Omega\) at \(25^{\circ} \mathrm{C}\). Its resistance is \(340 \Omega\) at \(100^{\circ} \mathrm{C}\). Assuming a straight-line relationship between these two values, at what temperature will the thermistor's resistance equal \(1 \mathrm{k} \Omega\) ?