Find a parity check matrix for R2.

9/21 Lines and Linear Equations Word Problems and Graphs Review 1.1.4 & 1.1.5 on your own HW: 1.1 7, 15, 19, 29, 31, 45, 46, 52, 53 Install R on your laptops and try it out: mac,windows, tutorial Graph of a LIne Line Slope Equations for a Line Standard Form all linear equations with 2 variables can be ax+by+c=0 Point Slope Form yy =m(xx ) 0 0 SlopeIntercept Form y=mx+b Applied Example A corn stalk growing is measured at 80 cm tall. Two weeks later the same plant is measured at 120 cm. How old was the plant when the measurement was first taken How fast is the plant growing Given: 2 points (t ,801 (2,120) Find: slope and t 1 Set t10 to find slope first 120cm−80cm m= 2wk−0wk =40/2=20 cm/wk The plant grows 20 cm per week The plant was 4 wks old at the first measurment.