Answer 1

Given:
R = {(2, 1), (4, 7), (1, −2), ...}
We can observe that 

\[1 = 3 \times 2 - 5\]

\[7 = 3 \times 4 - 5\]

\[ - 2 = 3 \times 1 - 5\]

Thus, the linear relation between the components of the ordered pairs of the relation R is y = 3x - 5.