Determine which relation is a function. O {(-4, 1), (-2, 3), (-1, 2), (3, 5), (3, 2)}
O {(4, 1), (-2, 3), (-1, 1), (-1, 5), (3, 2)}
O {(-4, 1), (-2, 3), (-2, 1), (-1, 5), (3, 2)}
O {(-4, 3), (-2, 3), (-1, 2), (2,5), (3, 2)}

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0

Me! i will mark brainliest! i don't get polynomials and all that other stuff. so this question is really hard. multiply and simplify.(x - 4) (x^2 – 5x – 6)show your