(01.01 hc)point n on the number line shows rob's score after the first round of a quiz: in round two, he lost 6 points. which expression shows how many total points he has at the end of round two? these are the answers they have: a.1 + (−6) = −5, because −5 is 6 units to the left of 1 b.1 + 6 = −5, because −5 is 6 units to the left of 1 c.1 + (−5) = −6, because −6 is 5 units to the left of 1 d.1 + 5 = −6, because −6 is 5 units to the left of 1