1. The graph of y = 2x+1 is a straight line When x increases, y increases twice as fast, so we need 2x When x is 0, y is already 1. So +1 is also needed

2. y = 2x + 6. Swap sides so that all variable terms are on the left hand side. Swap sides so that all variable terms are on the left hand side. 2x+6=y. 2x + 6 = y. Subtract 6 from both sides. Subtract 6 from both sides. 2x=y-6. 2x = y − 6.