Algebra 1 Review #5

Front

What is the x-intercept of the equation y = 3x + 18?

Back

The x-intercept is -6.

Front

How many zeros does a parabola with two x-intercepts have?

Back

A parabola with two x-intercepts has 2 zeros.

Front

What is the equation for inverse variation?

Back

The equation for inverse variation is y = k/x, where k is a constant.

Front

If f(x) = 2x^2 - 4x, what is f(3)?

Back

f(3) = 6.

Front

What does it mean if a table represents direct variation?

Back

It means that as one variable increases, the other variable also increases proportionally.

Front

What does it mean if a table represents inverse variation?

Back

It means that as one variable increases, the other variable decreases proportionally.

Front

What is the standard form of a quadratic equation?

Back

The standard form is ax^2 + bx + c = 0.

Front

How do you find the vertex of a parabola given in standard form?

Back

The vertex can be found using the formula (-b/2a, f(-b/2a)).

Front

What is the quadratic formula used for?

Back

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

Front

What is the difference between a linear function and a quadratic function?

Back

A linear function has a constant rate of change and graphs as a straight line, while a quadratic function has a variable rate of change and graphs as a parabola.