Given the points A(3,7), B(6,1) and C(20,8), prove that AB is perpendicular to BC. PLS HELP ME ASAPPP

Which is a graph of a proportional relationship?

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?

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account