Here's the solution to matching the formulas to the graphs:
- y = 3x + 1 corresponds to graph 'a'. This is a linear function with a positive slope, intersecting the y-axis at y = 1.
- y = -x - 2 corresponds to graph 'б'. This is a linear function with a negative slope, intersecting the y-axis at y = -2.
- y = 2/x corresponds to graph 'г'. This is a hyperbola with the x and y axes as asymptotes.
- y = -1/(2x) corresponds to graph 'в'. This is a hyperbola.