Temperature Dependence of Resistivity

A silver wire has a resistance of $2.1 \mathrm{\Omega }$ at $27.5 ℃$ and a resistance of $2.7 \mathrm{\Omega }$ at $100 ℃$. The temperature coefficient of resistivity of silver is $x\times {10}^{-3} {℃}^{-1}$. Determine $x$ to the nearest integer.

How does the resistance of a conductor vary if temperature of conductor is increased?

Define temperature coefficient of resistance.