Question 7310
1) this one is easy. slope -2/3 means that there us a {{{-2/3*x }}} part of the equation. Y=intercept of -8 means that the constant is -8.

{{{y=-(2/3)*x-8}}}

2) try doing it yourself, write y=3x+a. For point 2, 1 (x=2, y=1), write: 1=3*2+a, solve for a.

3) 

*[invoke find_equation_of_line -2, 2, 2, -10]