NEED HELP MATH PLZ ASAP

Which linear function represents the line given by the point-slope equation y + 1 = –3(x – 5)?

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?

If the function m(x) has the point (5,2) on its graph name a point that would be on the funtion m(5x)