April Regents Review

What are the zeros of the function f(x) = x² — 13x — 30? 

• —10 and 3
• 10 and —3
• —15 and 2
• 15 and —2

Which function represents exponential decay?

• f(x) = 100(0.9)^x 
• f(x) = 10(1.09)^x 
• f(x) = 1.9^x
• f(x) = ½(9)^x

If A = 3x² - 6x  and B = 12x- 6x², what is B - A?

• -9x² + 18x
• 9x² - 18x
• -3x² + 6x
• -3x²

A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet. What is the average rate of change? 

• 200
• 150
• 300
• 75

What is the range of the graph?

• y≥1
• x≥1
• All real numbers
• none of these

Choose the best choice.

• 1

• 2

• 3

• 4

• (1)

• (2)

• (3)

• (4)

• 8.3

• 8.7

• 3

• -3

• (1)

• (2)

• (3)

• (4)

• (1)

• (2)

• (3)

• (4)