Im having a hard time on edge any tips?

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

In what form is the following linear equation written y=9x+2

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined