Parallel lines have the same slope, so the slope of the other line is also 1/6
Changing the subject of the formula
Differences:
point slope form of line:
(a) equation is 
where m is slope and (x1,y1) is a point
(b)This equation of line can be determined when two points are given
(x1, y1) and (x2,y2)
slope intercept form of line:
(a) equation is 
where m is a slope
b is y-intercept
(b)This equation of line can be determined when y-intercept and slope are given
Similarilties:
(a) both are equation of straight line
(b) slope is always constant in both
There are 52 weeks in a year ,so each week you put away $20 every week.It will take 100 weeks to reach $2,000.