Algebra STAAR Review

Front

What is a parabola?

Back

A parabola is a symmetrical, curved shape that represents the graph of a quadratic function. It can open upwards or downwards.

Front

What does it mean for a parabola to have zeros?

Back

Zeros of a parabola are the x-values where the graph intersects the x-axis. They represent the solutions to the equation when set to zero.

Front

How many zeros can a parabola have?

Back

A parabola can have 0, 1, or 2 zeros.

Front

What is the vertex of a parabola?

Back

The vertex is the highest or lowest point of the parabola, depending on its orientation.

Front

What is the standard form of a quadratic equation?

Back

The standard form is y = ax² + bx + c, where a, b, and c are constants.

Front

What is the axis of symmetry in a parabola?

Back

The axis of symmetry is a vertical line that divides the parabola into two mirror-image halves, passing through the vertex.

Front

What is the significance of the 'a' value in a quadratic equation?

Back

The 'a' value determines the direction of the parabola (upward if positive, downward if negative) and its width.

Front

What is the quadratic formula?

Back

The quadratic formula is x = (-b ± √(b² - 4ac)) / (2a), used to find the zeros of a quadratic equation.

Front

What is an exponential function?

Back

An exponential function is a mathematical function of the form y = ab^x, where 'a' is a constant, 'b' is the base, and 'x' is the exponent.

Front

How do you identify the number of zeros in a parabola graphically?

Back

Count the number of times the parabola intersects the x-axis.