MATH 9 Second Quarter Review

The following symbols are used to denote inequality except _______.

• <

• >

• =

• ≤

Which of the following best describes a quadratic inequality?

• An equation with a variable raised to the power of 2.

• An equation with a variable raised to the power of 3.

• An inequality with a variable raised to the power of 3.

• An inequality with a quadratic expression involving a variable.

Among the following mathematical sentences, determine which one represents a quadratic inequality.

• x + 5 < 0

• 2x + 3 > 0

• x^2 - 4x + 3 > 0

• x^3 - 2x^2 + x - 3 = 0

When graphing a quadratic inequality, which symbol/s will you use if a shaded circle is utilized?

• Equal

• Unequal

• Less than, greater than

• Less than or equal to, greater than or equal to

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

• A ball thrown into the air
• A bird flying in the sky
• A person walking in a circle
• A car driving on a straight road

Transform the quadratic function y=2x^2-4x+3 into vertex form.

• y=2(x-1)^2+1
• y=2(x+1)^2+1
• y=2(x-2)^2+3
• y=2(x-3)^2+4

Given y=4(x+1)^2-3, find the standard form of the quadratic function.

• y = 4x^2 - 8x + 1
• y = 4x^2 + 8x - 3
• y = 4x^2 + 8x + 1
• y = 4x^2 + 6x + 1

Using quadratic function in form y=ax^2+bx+c, determine the values of a, b, and c of the function y=(x+3)(x-6)?

• a=1, b=-3, c=-18
• a=1, b=3, c=18
• a=0, b=3, c=18
• a=2, b=-4, c=-12

Which of the following situations is an example of direct variation?

• Speed and distance covered

• Distance covered and taxi fare   

• Speed and time used

• Distance travelled and time taken

What type of variation shows by the situation "The more you practice, the less mistakes"?

• Joint variation

• Combined variation

• Direct variation
• Inverse variation