Can someone please help

Issof claims that the scale factor is 1/2. which statement about his claim is correct

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?