Algebra Unit 4 Test Review Part 1

Front

If y varies directly with x, what is the constant of variation when y = 8 and x = 4?

Back

The constant of variation is 2.

Front

What is the equation of a vertical line that passes through x = -5?

Back

The equation is x = -5; the slope is undefined.

Front

What is the domain of a graph that includes all x-values from -7 to 5?

Back

The domain is -7 ≤ x < 5.

Front

If y varies directly with x, and y = 8 when x = -4, what is x when y = -48?

Back

x = 24.

Front

Find the slope of the line represented by the equation 2x - 3y = 6.

Back

The slope is 2/3.

Front

What does it mean for y to vary directly with x?

Back

It means that y = kx for some constant k.

Front

How do you find the slope from the equation of a line in standard form Ax + By = C?

Back

Rearrange to slope-intercept form (y = mx + b) to find the slope m.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

What is the range of a function?

Back

The range is the set of all possible output values (y-values).