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What is the correct interpretation of the slope coefficient estimate? (Select one option) Select one: O a. A person is expected to have 82.45 Facebook friends on average if their GMdensity increases by 1 unit. O b. A person is expected to have 82.45 more Facebook friends on average if their GMdensity increases by 1 unit. O c. GMdensity is not a significant predictor of number of Facebook friends at the 0.05 significance level. O d. A person is expected to have 82.45 Facebook friends on average if their GMdensity is equal to 1 unit.A study is conducted the examine the relationship between the number of friends an individual has on Facebook and the grey matter density in the area of the brain associated with social perception and associative memory. The Y (or response/dependent variable) is the number of friends on Facebook. The X (or explanatory/independent) variable is the grey matter density (call this GMdensity) in the relevant region of the brain. Some of the output from the regression model fit in Excel is shown below. Note that some of the entries in the ANOVA table have been deleted. Coefficients Standard Error Intercept 366.64 26.35 GMDensity 82.45 27.58 ANOVA df SS (Sums of Squares) MS (Mean Square) Regression 1 245400.47 245400.47 Residuals ?? 1043545.13 ?? Total 39 1288945.60 Answer the questions below using the output above. No working needs to be shown