Help me find the slope to 0,0 and 6,1

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

If value of cos330° is √3/2 then find tan165°.

Which graph has a rate of change of zero