You guys are smart !
a scuba diver dove from the surface of the ocean to an elevation of −49 9/10
feet at a rate of −15.4 feet per minute. after spending 13.75 minutes at that elevation, the diver ascended to an elevation of −8 9/10
feet. the total time for the dive so far was 20 1/8
minutes. what was the rate of change in the diver's elevation during the ascent? round your answer to the nearest hundredth.

the rate of change of the diver's elevation was /min.

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?