Answer:
A proportional relationship
[tex]y=3x[/tex]
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form [tex]y/x=k[/tex] or [tex]y=kx[/tex]
we have the points
(1,3) ----> [tex]k=y/x[/tex] ---->[tex]k=3/1=3[/tex]
(2,6) ----> [tex]k=y/x[/tex] ---->[tex]k=6/2=3[/tex]
(3,9) ----> [tex]k=y/x[/tex] ---->[tex]k=9/3=3[/tex]
(4,12) ----> [tex]k=y/x[/tex] ---->[tex]k=12/4=3[/tex]
(5,15) ----> [tex]k=y/x[/tex] ---->[tex]k=15/5==3[/tex]
therefore
The relationship between the input (x) and the output (y) represent a proportional relationship
The constant of proportionality is equal to k=3
The equation is equal to
[tex]y=3x[/tex]