A line that passes through (–1, –4) and (3, k) has a slope = k. What is the value of k?
Choose the correct answer:	A) 3 / 4	B) 1	C) 4 / 3	D) 2	E) 7 / 2

Rationale: "this is a considerably more difficult one , which will involve some algebra . let ’ s say that the “ first ” point is ( – 1 , – 4 ) and the “ second , ” ( 3 , k ) . the rise = k + 4 , which involves a variable . the run = 3 – ( – 1 ) = 4 . there the slope is ( k + 4 ) / 4 , and we can set this equal to k and solve for k . { { k + 4 } / 4 } = k k + 4 = 4 k 4 = 3 k k = 4 / 3 answer = c"
Answer: C