I really need help solving this problem since I don't quite understand it.

Here are the options:
Slope for least square regression line:
1.) -1. 72
2.) -0. 32
3.) 0.32
4.)1.72

The units of the slope line:
1.) centimeters
2.) days
3.)days per centimeters
4.) centimeters per day

plants hight will:
1. decrease
2. increase

by about:
1.) 0.32
2.)1.72

The y-intercept:
1.) -1. 72
2.) -0.32
3.) 0.32
4.) 1.72

units of the y-intercept:
1. days
2. centimeters
3. days per centimeters
4. centimeters per days

the y-intercept tells you the:
1.) typical change in height each day
2.) actual change in height each day
3.) typical plant height compared to the soil line when planted
4.) actual plant height compared to the soil line when planted

Hope this makes sense :)