Question

PLEASE HELP!!!!!!can you solve and explain 1-4

Answer 1

1. 3x - 3y = 9  

to find the x or y intercept, multiply the other variable that you are not tryng to find by 0  

3x - 3(0) = 9             3(0) - 3y = 9

3x = 9                       -3y = 9

3x/3 = 9/3                 -3y/-3 = 9/-3

x = 3                           y = -3

2. I did the same thing for the rest

x = 6     y = -2

3.   x = 2.5     y = -5

4.  x = -4  y = -2/3