1. If the variables x and y are related by the equation y=mx+b, then x and y are [ Select answer "quadratically", "linearly", "exponentially", "logarithmically", "matrix"] related and the slope m is the [ Select ] ["ratio", "quotient", "rate of change", "intercept"] of y with respect to x.

2. A regression model can be used to [ Select ] ["average", "interpolate", "extrapolate"] between points in a data set or to [ Select ] ["extrapolate", "average", "interpolate"] or predict points outside the data set.