For the remaining questions, consider the following problem description: An oil company is considering exploring new well sites S₁, S2, ..., S10 with respective costs C1, C2, C10. And in particular they want to find the least-cost selection of 5 out of the 10 possible sites. The binary decision variables X₁, X2,..., X10 denote the decision to explore the corresponding site. *** 3

". With the following three possible examples of best-fit lines:Line 1  The straight line pass through only two data pointsLine 2  The straight line did not pass through any data pointLine 3 The straight line did not pass through any data point Are each of the following statements true or false?1. no straight line can pass through all data points exactly. a. Trueb. False 2. line 1 does not fit the data points very well because too many points are the the right. a. Trueb. False 3. line 2 does not fit the data points very well because too many points are above the line. a. Trueb. False 4. line 3 does not fit the data points perfectly, but seems to have the best fit of these three lines. a. Trueb. False

please solve

7.) 7.) which of the following describes a direct relationship between and independent and a dependent variable, after controlling for a third variable? a. the bivariate relationship changes acress the partial tables. b.one partial table is the same as the bivariate table, the other(s) are very different c. the bivariate realtionship is the same across the partial tables d. the partial tables have many empty cells.