Linear Functions Unit Review

Front

What is the y-intercept in the equation y = 2x - 3?

Back

The y-intercept is -3.

Front

Is the set of ordered pairs (1,2), (2,4), (3,6) a function?

Back

Yes, it is a function.

Front

Write the equation of the line with a slope of 1 and a y-intercept of 1.

Back

y = 1x + 1.

Front

Find the y-intercept from the table of values: (0,6), (1,8), (2,10).

Back

The y-intercept is 6.

Front

Write the equation of the line with a slope of -3/4 and a y-intercept of -3.

Back

y = (-3/4)x - 3.

Front

What does it mean for a relation to be a function?

Back

A relation is a function if each input has exactly one output.

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What is the standard form of a linear equation?

Back

Ax + By = C, where A, B, and C are integers.

Front

What is the slope of the line represented by the equation y = 2x + 5?

Back

The slope is 2.

Front

How do you determine if a graph represents a function?

Back

Use the vertical line test: if a vertical line crosses the graph more than once, it is not a function.