Slope (m) 0.30 Y-Intercept (0, b) -64.52 3 C Finally, project the CPI forward an additional 5 years using your slope and intercept; calculate the 5-year inflation rate from your year 6 CPI The Year Number to use for your further 5-year projection 2021 The projected CPI value for that year + The 5-year inflation rate based on the last CPI value in the table and the projected CPI value Your Budget Total (brought forward from above) Your 5-year Budget Total Projection