Mercedes created color panels for a wall using a mix of only green and yellow paints. She plotted the quantities of green and yellow paints used for each mix and connected them using a line segment, as shown in the graph.

Which statement best describes the domain of the function represented in the graph?

2 ≤ x ≤ 10
2 ≤ x ≤ 18
10 ≤ x ≤ 18
0 ≤ x ≤ 10

Consider the linear model for a two-stage nested design with b nested in a as given below. yijk=\small \mu + \small \taui + \small \betaj(i) + \small \varepsilon(ij)k , for i=1,; j= ; k=1, assumption: \small \varepsilon(ij)k ~ iid n (0, \small \sigma2) ; \small \taui ~ iid n(0, \small \sigmat2 ); \tiny \sum_{j=1}^{b} \small \betaj(i) =0; \small \varepsilon(ij)k and \small \taui are independent. using only the given information, derive the least square estimator of \small \betaj(i) using the appropriate constraints (sum to zero constraints) and derive e(msb(a) ).