The graph of f(x)=2x+1passes through the points (-1 , 1) and (3 , 16). Rebecca wants to find the average rate of change from x = -1 to x = 3. Here is her work:

3−(−1)16−1=415
a. Explain Rebecca's error. (2 points)

b. Find the correct average rate of change. (2 points)

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

25) 56(1) = 5b a. identity property of addition b. identity property of multiplication c. commutative property of multiplication d. commutative property of addition