The following data gives the melting point of an alloy of lead and zinc, where is the temperature in degrees and p is the percentage of lead in the alloy 70 40

The following data gives the melting point of an alloy of lead and zinc, where is the temperature in degrees and P is the percentage of lead in the alloy 70 40 180 50 204 60 226 80 276 90 304 250 Find the melting point of the alloy containing 84 percent lead.