The temperature of a city changed by −15 degrees celsius over a 5-week period. the temperature changed by the same amount each week. part a: write an expression to show the average change in the temperature of the city each week. (5 points) part b: simplify the expression and explain, using words, what your answer means. (5 points)

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct