Given the data points:

1. [tex]x = 5.8[/tex], [tex]y = 5.8[/tex]
2. [tex]x = 7.5[/tex], [tex]y = 7.5[/tex]
3. [tex]x = 11.2[/tex], [tex]y = 11.2[/tex]

Find the constant of proportionality [tex]r[/tex] in the equation [tex]y = rx[/tex].

[tex]r = [/tex]