Use the point-slope formula to write n equation of the line given the following information. Give your answer (if possible) in:

a. slope-intercept form

b. standard form

1. The slope is -2 and the line passis through the point (1,5)

2. The line passes through the points (1,-3) and (-7,2)

3. The line passes through the point (4,-1) and is parallel to the line y=3x+1

4. The line passis through the point (-2,-2) and is perpendicular ot the line y=1/3x-5

5. The line passes through the point (5,-2) and is perpendicular to the line x=0

6. The slope is undefined, and the line passes through the point (2,-1)