What is the slope & how did you get your answer?

What is the best reason for jacinta to have a savings account in addition to a checking account

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]