how to solve for the 3 questions below the tables

Table 1: R VS. L Wire Radius Wire Radius Cross-sectional (mm) (m) Area, Ttr2 (m?) .78m .00078mm 1.9x104-6 Wire Resistance Length (m) (Ohms) 5.7m 2.63 7.2m 3.30 1.3m 0.60 4.4m 1.99 4.0m 1.85 Slope of Resistance vs. Wire Length: Resistivity of Nichrome (Slope x Cross-sectional Area): % Error (Theoretical resistivity of Nichrome is 100x10 8 Ohm-m)