How to write 153,400,78 expanded form

What is the equation of the line shown in this graph?

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation