Which set of ordered pairs is made up of points on the graph of the function below? y=-2x+8

Ineed i do not understand i'm only 8

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50