13.two quantities ,x and y, vary directly, if x=5 and y=20, find y when x=45. 14.two quantities ,x and y, vary directly, if x=8 and y=48, find y when x=32.

If a(0,0,0) and b(2,2,2) are points in coordinate space, how many paths are there from a to b that move from one lattice point to another in the positive x-,y- or z- direction?

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%

Through: (-3,-3) parallel to y= 7/3x+3