Lesson 25 - 9.1 # 2 Write in form	Lesson 25 - 9.1 # 3 Write in form
Lesson 25 - 9.1 # 6 Write in form	Lesson 25 - 9.1 # 7 Determine if graph of power function is Even, Odd or fractional powers. Function is Even (symmetrical about y-axis)
Lesson 25 - 9.1 # 9 Determine if graph of power function is Even, Odd or fractional powers. Function is Fractional (steeper near origin and flatter away from it)	Lesson 25 - 9.1 # 10 Determine if graph of power function is Even, Odd or fractional powers. Function is Odd (symmetrical about origin)

Lesson 25 - 9.1 # 13 Find a power function given 2 points: (6, 17) and (1, 2). Using the form: (1, y1 ) and (x2 , y2 ) For (1, 2): Using (6, 17) and k = 2: So power function is	Lesson 25 - 9.1 # 15 Find formula for inverse proportional function with points (4, 6). (a) Formula: Using (4, 6), k is: So formula is (b) Find x when y = 8:
Lesson 25 - 9.1 # 30 30 minutes Super Bowl commercial spot in 2002. Given: (2002, cost = $2 mils for 30 sec) and (1967, cost = same for 22.989 min). (a) Cost in dollars/sec in 2002 is: Cost in dollars/sec in 1967 is: (b) So 2002 cost is Or 46 times more expensive than in 1967	Lesson 25 - 9.1 # 37 Expanding oil spill in circular form problem - 200 m per hour: (a) Express radius of spill as power function. Per hour (b) Express area of spill as power function (c) when t = 7, Area is:
Lesson 25 - 9.1 # 37 Kepler's Law . (a) So , a power function. When P = 365 and d = 93,000,000 (b) For Jupiter, d = 483,000,000, so