Given a point-slope form equation, we can easily locate of the slope of the linear equation. As a review, the point-slope form can be expressed as

where y₁ and x₁ are the x and y-coordinates of the equation and m is the slope. Seeing that (y-2) = 3(x-1) is already in this form, we can clearly see that the slope of the equation is equal to 3.
Answer: 3
If you initially have 6 W, 4 R, and 8 B, and you take away two whites and a red, then you have 4W, 3 R and 8 B. There are 15 marbles total, and 8 black marbles, so you have an 8 in 15 or 53% chance of picking a black marble.
Ax=15+bx
ax-bx=15
x(a-b)=15
x=15/(a-b)