1. Find the slope of the line passing through the points (7, –4) and (–6, –7).
- Slope = rise/run = (y2 - y1)/(x2 - x1) = (-4 - -7)/(7 - -6) = (-4 + 7)/(7 + 6) =
-3/13
2. |2x + 7| = 1
Split into 2 equations and solve for x:
2x + 7 = 1 and 2x + 7 = -1
- 7 -7 - 7 -7 subtract 7 on each side to get 2x by itself
__________ ____________
2x = -6 2x = -8
/2 /2 /2 /2 divide by 2 on each side to get x by itself
__________ ____________
x = -3 x = -4
x = -3, -4