On the coordinate grid, the graph of y = -x - 1 is What is the range of the graphed function?
shown. It is a reflection and translation of y = 3x.
7
O {x 1-2 < x <2}
O {y 1-2 < y<2}
O {x x is a real number}
O {yly is a real number}
6
5
4+
3-
2-
1
-5 -5 -4 -3 -2 -
1 2 3 4 5 6 7 x
A
-2
-3
4.
-5
-S

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.