this is the result Call: lm(formula = biomass ~ depth + distance, data = gabys_seagrass) Residuals: Min 1Q Median 3Q Max -36.071 -6.227 -0.788 5.994 30.002 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 54.534078 16.277507 3.350 0.0024 ** depth -10.597178 6.914549 -1.533 0.1370 distance 0.047994 0.006636 7.232 8.88e-08 *** --- Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 Residual standard error: 14.02 on 27 degrees of freedom Multiple R-squared: 0.6816, Adjusted R-squared: 0.658 F-statistic: 28.9 on 2 and 27 DF, p-value: 1.951e-07