Math 2: Review

Front

What is the definition of direct variation?

Back

Direct variation is a relationship between two variables where one variable is a constant multiple of the other. It can be expressed as y = kx, where k is the constant of variation.

Front

What is the definition of inverse variation?

Back

Inverse variation is a relationship between two variables where the product of the two variables is a constant. It can be expressed as xy = k, where k is the constant of variation.

Front

How do you determine the constant of variation in inverse variation?

Back

To find the constant of variation in inverse variation, multiply the two variables together (k = xy).

Front

What is the sine function in trigonometry?

Back

The sine function relates the angle of a right triangle to the ratio of the length of the opposite side to the hypotenuse. It is defined as sin(θ) = opposite/hypotenuse.

Front

What is the cosine function in trigonometry?

Back

The cosine function relates the angle of a right triangle to the ratio of the length of the adjacent side to the hypotenuse. It is defined as cos(θ) = adjacent/hypotenuse.

Front

What is the tangent function in trigonometry?

Back

The tangent function relates the angle of a right triangle to the ratio of the length of the opposite side to the adjacent side. It is defined as tan(θ) = opposite/adjacent.

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a figure around a fixed point at a certain angle.

Front

What is a translation in geometry?

Back

A translation is a transformation that moves every point of a figure the same distance in the same direction.

Front

What is the rule for reflecting a point across the line y=x?

Back

The rule for reflecting a point (x, y) across the line y=x is (y, x).