Determine the equation from graph

Determine the equation that represents the relationship between and in the graph below.
  1. Determine which type of equation, linear or exponential, will fit the graph.
  2. Identify at least three points from the graph.
  3. Find the slope of the line, using any two of the points.
  4. Find the -intercept of the line.
  5. Use the slope and -intercept to find an equation of the line.