Emma and Tiana write linear equations given the slope and point, determine if a point is a solution to a line, and write linear equations given two points.
Timestamps:
write equation given slope and a point
0:10 example 1: m=2, (1,3)
0:34 solving for b
1:16 writing equation of line
1:23 example 2: m= 2/3, (3,4)
1:51 solving for b
2:11 writing equation of line
2:23 example 3: m=4, (3,2)
2:39 solving for b
3:10 writing equation of line
3:20 is it a point on the line?
3:27 example 4: y=(1/2)x+5, (5,10)
4:12 example 5: y=(1/2)x+5, (8,1)
4:35 verify graphically
4:40 write equation given two points
example 6: (7,0), (3,2)
4:55 find slope by graphing and slope triangle
find slope with just the two points
5:51 first point minus second point
6:33 second point minus first point
6:52 *either subtraction works as long as it corresponds
7:02 find yintercept
7:34 use first point
7:44 use second point
8:22 *either point works, don't need to do it twice
8:47 writing equation of line