1. Is the data representative of a linear, exponential, quadratic, or polynomial model?

x 0.5 0.8 1.1 2.3 2.4 2.9 4.4

y 2.3 3.7 6.1 44.3 22.5 118.1 1418.5

A. Linear
B. Quadratic
C. Exponential
D. Polynomial

2. A least squares regression is f(x) = -3.19x + 123.63, r^2 = 0.59.

The strength of the direction is:

A. Very weak
B. Moderately weak
C. Very strong
D. Moderately strong