Alg 2 Test 2 Practice

Front

What is the vertex of the parabola represented by the equation y=5(x-2)²–7?

Back

(2, -7)

Front

How do you find the value of a function at a specific point, such as f(5)?

Back

Substitute the value of x into the function and simplify.

Front

What is the value of f(-2) if f(x) = 5(x-2)²–7?

Back

1

Front

What is the definition of a function?

Back

Every input has only ONE output.

Front

How can you determine if a graph represents a function?

Back

Use the vertical line test; if a vertical line intersects the graph at more than one point, it is not a function.

Front

What is the standard form of a quadratic function?

Back

y = ax² + bx + c.

Front

What does the 'a' value in the quadratic function y = ax² + bx + c indicate?

Back

It indicates the direction of the parabola (upward if a > 0, downward if a < 0) and the width of the parabola.

Front

What is the axis of symmetry for the parabola y = 5(x-2)²–7?

Back

x = 2.

Front

How do you find the y-intercept of a quadratic function?

Back

Set x = 0 and solve for y.

Front

What is the significance of the vertex in a parabola?

Back

The vertex represents the maximum or minimum point of the parabola.