Identify the constant of proportionality in each group and use it as an equation in the form y= kx

Answer:
wouldn't it be 2.25
Step-by-step explanation:
because you divide coordinates (4,9) so 9/4 = 2.25?
Answer:
Step-by-step explanation:
5.
y=kx
when x=4,y=5
5=4k
k=5/4
y=5/4 x
or y=1.25 x
6.
y=kx
when x=4,y=9
9=4k
k=9/4
y=9/4 x
or y=2.25 x