A2 Review 3 Mix

Front

What is the significance of the ordered pair (2, -4) to the graph?

Back

It is the vertex.

Front

The axis of symmetry line passes through which point?

Back

Vertex.

Front

Which system of equations could be used to find the exact number of dimes and nickels if Dennis mowed his neighbor’s lawn for 80 coins totaling $6.60?

Back

d + n = 80; 0.10d + 0.05n = 6.60.

Front

What is the equation of a line with a slope of -2 and a y-intercept of -3?

Back

y = -2x - 3.

Front

How do you find the x-value of the vertex for the quadratic function f(x) = -x^2 - 4x + 12?

Back

Use the formula x = -b/(2a), where a = -1 and b = -4, giving x = -2.

Front

What is the standard form of a quadratic equation?

Back

y = ax^2 + bx + c.

Front

What does the vertex of a parabola represent?

Back

The highest or lowest point of the graph, depending on the direction of the parabola.

Front

What is the formula to find the axis of symmetry for a quadratic function?

Back

x = -b/(2a).

Front

What are the x-intercepts of a quadratic function?

Back

The points where the graph intersects the x-axis, found by solving the equation y = 0.

Front

What is the y-intercept of a linear equation?

Back

The point where the graph intersects the y-axis, found by setting x = 0.