The variables x and y vary directly. use the values to find the constant of proportionality,
. then write an equation that relates.
. write any fractions in simplest form.
y=45; x=40

k=?

y=?

direct variation equation: y=kx

When ∆rst is translated 4 units down, what are the apparent coordinates of t’? give 15 points

What is x and y intercepts for y=x+7

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?