Write an equation from the graph

Answer:
[tex]\large\boxed{m(n)=5n}[/tex]
Step-by-step explanation:
for n = 1 we have value 5
m(1) = 5(1) = 5
for n = 2 we have value 10
m(2) = 5(2) = 10
for n = 3 we have value 15
m(3) = 5(3) = 15
for n = 4 we have value 20
m(4) = 5(4) = 20