Answers are as follows:
1. y = -2x + 1
y = -1.7x
2. y = 4x + 5
y =1/3x - 2.5
3. They both have a positive slope
4. The lines that decrease from left to right have a negative slope and the slope and y intercept are very close in its number making the lines close together.
The lines that increase from left to right have a positive slope. The y intercepts are far apart in number (one positive one negative) making the lines far apart.
