Test Formulas: m=y2-y1x2-x1;   y=mx+bJohnny has 1470 followe…

Test Formulas: m=y2-y1x2-x1;   y=mx+bJohnny has 1470 followers of Twitter. After a particularly moronic sequence of political tweets, he begins to lose 15 followers a day at a steady rate. Part a) If “f” represents the number of followers and “d” represents the number of days, write a linear equation to model this situation. Part b) How many followers will Johnny have after 25 days? Part c)  How many days will it take Johnny to lose all his followers?