The figure below shows a line graph and two shaded triangles that are similar: Which statement about the slope of the line is true?
A). It is throughout the line.
B). It is −3 throughout the line.
C). The slope from point O to point A is times the slope of the line from point A to point B.
D). The slope from point O to point A is 3 times the slope of the line from point A to point B.