1. The simplest mathematical model for relating two variables is the ________ equation in two
variables y = mx + b.
2. For a line, the ratio of the change in y to the change in x is the ________ of the line.
3. The ________-________ form of the equation of a line with slope m passing through the point (x1, y1) is y − y1 = m(x − x1).
4. Two distinct nonvertical lines are ________ if and only if their slopes are equal.
5. Two nonvertical lines are ________ if and only if their slopes are negative reciprocals of each other.
6. When the x-axis and y-axis have different units of measure, the slope can be interpreted as a ________.
7. ________ ________ is the prediction method used to estimate a point on a line when the point does not lie between the given points.
8. Every line has an equation that can be written in ________ form.