Question: A line is parameterized by x =2+3t and y =4+7t.
(a) What part of the line is obtained by restricting t to nonnegative numbers?
(b) What part of the line is obtained if t is restricted to -1 ≤ t ≤ 0?
(c) How should t be restricted to give the part of the line to the left of the y-axis?