Use the two-point form of the linear equation. Fill in the missing blanks using (1, 1) for (x1, y1). You will need both points to determine the slope, y2 − y1 x2 − x1 . y − 1 = − 2 3 − 1 6 − 1 x −

The point-slope form of a linear equation is a formula that allows a person to calculate the slope and point of intercept of a line, and then once you calculate the linear equation, you can calculate the x and y coordinate of any point on the line!

1. Choose two points on a line.

2. Indicate the y1 (the y coordinate of the first point) and y2 (the y coordinate of the second point).

3. Indicate the x1 (the x coordinate of the first point) and the x2 (the x coordinate of the second point)

4. Plug the previously identified variables into the slope formula where the slope is equal to (y2-y1)/(x2-x1)

5. Subtract y2 and y1.

6. Subtract x2 and x1.

7. Divide the quantity in #5 by the quantity in #6. This is your slope.

8. Observe the equation: y=mx+b where "m" is the slope calculated in #7.

9. Plug in the slope for "m"

10. Using one of the points identified earlier, plug in y1 into "y" and x1 into "x". Rearrange and solve for b.

11. Then plug in the value "b" into y=mx+b. Make sure to leave the unknown variables "x" and "y", but make sure to still plug in the "m" calculated earlier!

a is the correct