First you would figure out how much Jade is running per lap. Since she runs 6 laps to make a mile, for every lap she runs, she runs 1/6 of a mile every lap.
Then seeing that you see how much distance she needs to run which is 5/6 of a mile. You would take the total amount she needs to run 5/6 and divide it by the amount she runs every lap 1/6.
The equation of a line that passes through the point (x1,y1) and has a slope of m is y-y1=m(x-x1) given (6,-3) (x1,y1) and slope is 1/2 y-(-3)=1/2(x-6) y+3=1/2(x-6) that is point slope