Which of the following statements is TRUE? A. Parallel lines have the same slope and the same y-intercept. B. A line with an undefined slope is parallel to a line with a slope of zero. C. The slopes of perpendicular lines are negative reciprocals of one another. D. Two lines with undefined slopes are parallel to each other and parallel to the x-axis.

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.