Please help, I dont know how to get the other angle measurement.

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.