Quiz on Models Real-life Situations Using Quadratic Function

1. It is a function that can be written in the form of y=ax²+bx+c, where a,b, and c are real numbers a≠0.

• Quadratic Function

• Linear Function

• Radical Function

• Square Root Function

The graph of a quadratic function is smooth curve called _________.

• Vertical Line

• Horizontal Line

• Oval

• Parabola

If a>0, the parabola opens ___________.

• Downward

• Upward

• Left

• Right

Which of the following represents a quadratic function?

• 3y²+3=x

• y=3x-3

• y=3+2x²

• y=3x-4²

Quadratic function is any function of the form: y=ax²+bx+c, where a,b, and c are real numbers and ______.

• a=0

• a≠0

• a≥0

• a<0

Which of the following real-life situations represents quadratic function?

• The total cost C(x) of producing a product is given by C(x)=0.1x²+500x+2000.

• Distance versus time if traveling a constant speed.

• The cost of function C of buying food is C(x)=50x.

• None of these

What is the highest exponent of a quadratic equation function?

• 1

• 2

• 3

• 4

Which of the following did NOT represent a quadratic function?

• y=x+5

• y=x²-4x+16

• y=2x²+5

• y=(x-2)(x+3)

Which of the following real-life situations/models did NOT represent a quadratic function?

• Alexandra's apple trees, x, planted in a farm could yield y=-2x²+280x+1600 per year.

• Jen has a C(x)= 10x+250 of oranges, where x is the number of kilos of oranges and P(x)= 18x-250.

• If 2400 feet is being used to fence a rectangular lot, then the area of fence lot is A(x)= x(1200-x).

• None of these

Which of the following represents a quadratic function?

• y=x

• y=3x²-5x

• y=20-x

• y=4x³-5x+1