The solution to your problem is as follows:
Since the equation of a line is:
y = mx + b; where m=slope, and b=y-intercept.
Therefore, the y-intercept of the line is -2.
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Answer:
a) For this case we define the random variable as X ="waiting time during peak hours" and we know that this distribution follows an uniform distribution:

Where a and b represent the limits of the distribution.
b) 
And the height for this case would be 0.125
Step-by-step explanation:
Part a
For this case we define the random variable as X ="waiting time during peak hours" and we know that this distribution follows an uniform distribution:

Where a and b represent the limits of the distribution.
Part b
For this case the density function would be given by:

And the height for this case would be 0.125
And
for other case.
The cumulative distribution function would be given by:



Answer: B
Step-by-step explanation:
LJ should corresponds with RQ but it should correspond with PR.