College Algebra

• −1 ∕ 3

• − 3

• 1 ∕ 3

• −5 ∕ 3

• 3

• I and II only

• I only

• II only

• II and III only

• I, II and III

• 6

• -2

• 4

• 3

• 9

What is the increasing interval for the following function?
f(x) = 3x² - 9 

• 0 ≤ x ≤∞
• -9 ≤ x ≤∞
• -∞ ≤ x ≤ -9
• -∞ ≤ x ≤∞

• A
• B
• C
• D

Find the value of the discriminant: 4x²-7x+8

• √79
• √-79
• -79
• -7±i√79/8

Write the equation in vertex form:
y = -2x²+16x+4

• y=-2(x-4)²+4
• y =-2(x+4)²+36
• y=-2(x+4)²+4
• y =-2(x-4)²+36

What is the vertex:
y = 2(x-3)²+18

• (-3,-18)
• (3,-18)
• (-3,18)
• (3,18)

Given f(x) = 3x - 2 and g(x) = x²-5. Find: (f-g)(2)

• 5
• 0
• 4
• 2

Which quadratic is the widest?

• y = -3/4x²+4x+1
• y=2x²-3x+7
• y=-4x²+9
• y=7/5x²-5x+1