Step 1: Add 3 to both sides because you want to cancel out the 3 so you do the opposite of what is say's. For example, if it says 2y-3 add 3 or 2y+3 subtract 3 from both sides.
Step 2: Add 3 to -5 which would be -2
Step 3: Since you're "multiplying" Y to 2 you're going to divide 2 to get Y by itself. So 2/2 cancels out and now you're left with y
Step 4: Divide 2 form -2 and you get -1
Let me know if you have any questions and I hope this helps
To find slope between two given points: (y2-y1)/(x2-x1) Find the difference between the first two points 12-9.5/2-1 = 2.5/1 = 2.5 14.5-12/3-2 = 2.5/1 = 2.5 17-14.5/4-3 = 2.5/1 = 2.5 The rate of change between each point is 2.5