The most common form of the equation of a line is point-slope form: y = mx + b. Because the line passes through the point (2,-3), those coordinates must satisfy the line's equation. Thus, we can write -3 = m*2 + b. The slope, m, will be the same as the slope of the line shown in the graph (since they are parallel). Then you can solve the equation for b. The final equation will be y = mx + b, but instead of m you will write the actual slope, and instead of b you will write the actual value that you found for b.