Use the graph below to answer the following question.
Find the slope of the line. Describe how one variable changes in relation to the other.
A coordinate graph is titled Distance Traveled. The horizontal axis is titled Time in hours. The vertical axis is titled Distance in miles.
The line starts at the origin and passes through the point with coordinates 1 comma 2, the point with coordinates 2 comma 4, the point with coordinates 3 comma 6, and the point with coordinates 4 comma 8.
A. 2; distance increases by 2 miles per hour
B. 2; distance decreases by 2 miles per hour
C. one-half; distance increases 1 mile every 2 hours
D. one-half; distance decreases 1 mile every 2 hours
1 answer
The correct answer is A. The slope of the line is 2, which means that for every one unit increase in time, there is a two unit increase in distance. Therefore, the distance increases by 2 miles per hour.