Whats the equation of the straight line on this graph

a) y=3x+4
b) y=2x+4
c) y=4x+4

Which equation matches the graph shown ?

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours