Day 6

Daily Objective- "Students will be able to write an equation of a line given data points."

• To find the equation of a line using data points, we must go back to day one, and look at the y2-y1 over x2-x1, equation. Say Mrs. Larson gives me the points (2,3) and (4,5). The first numbers (2 and 4) are always x, and the second numbers are y. Then you put 5-3 in for y, and 4-2 for x. You should get 2/2 which equals a slope of one. But we aren't finished yet. Now we need to insert a y for y so we'll use 5, and 4 for the x values. So now our equation looks like 5=1(4) +b. B=1. (1 x 4= 4. 4+1=5. ) 

Quiz

1. What is the equation of a line with the points (3,4) and (6,9)?
2. If the slope is 5, and the two points are (9,12) what is the rest of the equation? 
3. What is the slope if the points are (-45,6) and (34,8)?