A. Fill in the blanks with the correct term/phrase. 1. The __________ of a line is the ratio of the change in y to the change in x. 2. __________ lines have a slope of zero. 3. The slope in the equation y = 2x – 1 is _____. 4. The variable used to represent the slope is _____. 5. If the slope is positive, the line goes upward as x ____________.