Need help with 7 please.

Volunteer drivers are needed to bring
80 students to the championship
baseball game. Drivers either have cars,
which can seat 4 students, or vans,
which can seat 6 students. The
equation 4c + 6v = 80 describes the
relationship between the number of
cars c and number of vans v that can
transport exactly 80 students. Explain
how you know that this graph
represents this equation.

Need help with 7 please Volunteer drivers are needed to bring 80 students to the championship baseball game Drivers either have cars which can seat 4 students o class=