If the equation Gx=y has more than one solution for some y in R^n, can the columns of G span R^n? why or why not?

Would the table be considered quadratic, cubic, quartic, or linear ?

What is the equation for the following quadratic in the form y= ax^2 +bx +c

A sample of 25 families was taken for a study. The objective of the study was to estimate the factors that determine the monthly expenditure (in dollars) on food for families. The independent variables included in the analysis were the number of members in the family (x1), the number of meals eaten outside (x2), and a dummy variable (x3) that equals 1 if a family member is on a diet and equals 0 if there is no family member on a diet. The following regression results were obtained.   Coefficients Standard Error Intercept 450.08 53.6 x1 49.92 9.6 x2 10.12 2.2 x3 -.60 12.0     ANOVA         df SS MS Regression   3078.39 1026.13 Residual (Error)   2013.90 95.90 Total       What are the degrees of freedom for the sum of squares explained by the regression (SSR) and the sum of squares due to error (SSE)? Test whether or not there is a significant relationship between the monthly expenditure…