Which of these relations is a function? (2, 1)
(10, 13)
(10,-1)
(3, -13)
(9, 9)
(-15, 9)
(5, -16)
(5, -17)
(10, 16)
(11, 5)
(11, 17)
(7,5)
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The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

|p| > 3 {-3, 3} {p|-3 < p < 3} {p|p < -3 or p > 3}

You are living in aldine, tx and you are planning a trip to six flags in arlington, tx. you look on a map that has a scale of 0.5 inches to 30 miles. if the map shows the scale distance from aldine to arlington is 4 inches, how far is the actual distance?