To find slope, use the equation (y2-y1)/(x2-x1). In your case, the equation is going to look like (-3 - -1)/(5 - -2) or (-3 +1)/(5 + 2), and that simplifies to -2/7.
To solve these type of problem you have to make the denominator the same or use the claculator.
let us do this problem by making the denominator the same.


So, now. the one with the largest numerator is the largest fraction
In this case,

is the largest which is equal to

.
So, the largest fraction is

.
K= 23/7 simplified to 3 2/7
2y = 12 - 5x
y = 6 - 5/2x
2 = -5/2(-3) + b
2 = 15/2 + b
2 - 15/2 = b
b = -11/2
y = 15/2x - 11/2
Let 21 = Hypotenuse Let 15 = One leg on the y-axis.
Draw triangle. a^2+b^2 = c^2
a^2 = c^2 - b^2 a = sqrt(c^2-b^2)
sqrt(21^2 - 15^2) = ~14.7 ft
...|\ ...|..\ b.|....\ 21 ...|.....\ ...|____\ .......a