Math 3rd Quarter QE reviewer

What is the central idea in Mathematics?

• A set of ordered pairs

• A vertical line that divides the parabolic line into two equal symmetric parts

• A polynomial function

• Functions

What is the set of all inputs or x in a function called?

• X-intercept

• Y-intercept

• Range

• Domain

What does the constant of variation represent?

• The highest or lowest point of a parabola

• A set of ordered pairs

• A vertical line that divides the parabolic line into two equal symmetric parts

• The relation of two or more variables making them direct, inverse, joint, or combined variations

In a direct variation equation y = kx, what does the value of k represent?

• The constant of variation

• The value of x

• The value of the x-intercept

• The value of y

What is the axis of symmetry in a quadratic function?

• The constant of variation

• The highest or lowest point of a parabola

• A vertical line that divides the parabolic line into two equal symmetric parts

• The set of all outputs or y

How can the vertex of a parabola be found given the function y = f(x) = Ax² + Bx + C?

• By finding the value of b in the function

• By finding the value of k in a direct variation

• By using the formula

  h = -b/2a,

  and changing the values of x into h
  or A(h)²+B(h)+C

• By solving for roots in the quadratic equation

What does the x-intercept of a quadratic function represent?

• The point where the parabolic line would cross the y-axis

• The point where the parabolic line would cross the x-axis

• The value of the constant of variation

• The highest or lowest point of a parabola

What is concavity in the context of graphing a quadratic function?

• It is the value of the constant of variation

• It represents the set of all inputs or x in a function

• It dictates where the parabolic line starts downward or upward

• It is the highest or lowest point of a parabola

What is the equation of a quadratic function in the standard/vertex form?

• y = kx

• y = k/x

• f(x) = y = a(x-h)² + k

• f(x) = y = Ax² + Bx + C

What Variation is being referred to in the statement "y directly varies with x and z and varies inversely with v²"?