The figure below shows a line graph and two shaded triangles that are similar:
a line is shown on a coordinate grid. the x-axis values are from negative 10 to positive 10 in increments of 2 for each grid line. the y-axis values are from negative 5 to positive 5 in increments of 1 for each grid line. the line passes through the ordered pairs negative 8, 4, and 0, 0, and 8, negative 4. a shaded right triangle is formed so that its hypotenuse is from ordered pair 0, 0 labeled as o to negative 4, 2 labeled as a, one leg is from 0, 0 to negative 4, 0, and the second leg is from negative 4, 0 to negative 4, 2. another shaded right triangle is formed with the hypotenuse from negative 4, 2 to negative 6, 3, labeled as b, one leg is from negative 4, 2 to negative 6, 2, and the second leg is between negative 6, 2 to negative 6, 3.
which statement about the slope of the line is true?
it is −2 throughout the line.
it is fraction negative 1 over 2 throughout the line.
the slope from point o to point a is fraction 1 over 2 times the slope of the line from point a to point b.
the slope from point o to point a is two times the slope of the line from point a to point b.