Is the relation a function? Why or why not? {(–1, 9), (0, –1), (–1, 4), (4, 9)}

Yes; there is only one domain value for each range value.
No; a domain value has two range values.
No; a range value has two domain values.
Yes; there is only one range value for each domain value.

Find an equation for the linear function which has slope -10 and x-intercept -7

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Me max 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.