Palgrave Macmillan - Business - Quantitative Methods for Business

If f(x) = 4x² + 2x – 1, what is f(-2)?
1. 19
2. 11
3. -13
4. -21
When is y = ax² + bx + c a U–shaped curve?
1. When a > 0
2. When a < 0
3. When c > 0
4. When b > 0
At what point does y = 3x² + 6x – 2 cross the y-axis?.
1. y = 6
2. y = 3
3. x = -2
4. y = -2
At what point(s) does y = 4x² – 3x + 2 cross the x-axis?
1. x = 2
2. At no point
3. x = -1
4. x = 3, -2
At what point(s) does y = 5x² – 3x – 1 cross the x-axis?
1. x = 0.8385, -0.2385
2. At no point
3. x = 1
4. x = 1/5, 3/5
If profit = -0.05Q² + 2Q – 1000, state the value of Q which gives rise to the maximum profit.
1. Q = 100
2. Q = 2
3. Q = 20
4. Q = 1000
Which of the following curves goes through the point (0,1)
1. y = -2x² + 3
2. y = log10^x
3. y = 1/x
4. y = e^x
What happens to the curve y = 12 log10x for small positive values of x?
1. It has small positive values
2. It has small negative values
3. It has large positive values
4. It has large negative values
Which of the following curves is the same as y = x² but shifted 4 units to the left?
1. y = x² + 4
2. y = x² - 4
3. y = (x - 4)²
4. y = (x + 4)²
Evaluate y = 50x^-0.30103 when x = 0.1
1. y = 25
2. y = 100
3. y = 45
4. y = 50