Unless otherwise specified, assume that all matrices in these exercises are n × n. Determine which of the matrices in Exercises 1–10 are invertible. Use as few calculations as possible. Justify your answers.

Even More Matrices... Saturday, February 11, 2010:41 AM Plotting Saturday, February 11, 2017 11:10 AM plot(x,y,'extra') title('Graph Name') adds a name to the graph you're working on xlabel('x') adds label on x axis ylabel('y') adds label on y axis Stuff You Can Put in "extra" Points '.' makes all points a point 'o' circles 'x' x-mark '+' plus '*' star 's' square 'd' diamond 'v' triangle down '^' triangle up '' triangle right 'p' pentagram 'h' hexagram Colors 'b' makes line blue 'g' green 'r' red 'c' cyan 'm' magenta 'y' yellow 'w' white 'k' black Lines '-' makes line solid ':' dotted '-.' dash-dot '--' dashed Subplots subplot(r,c,f) lets you have multiple plots in one window