Math 7A Final Review

Front

What is the y-intercept on a graph?

Back

The y-intercept is the point where the graph crosses the y-axis. It is represented as (0, y).

Front

If Leo starts at -19 meters and goes up 9 meters and down 8 meters, what is his final elevation?

Back

Leo's final elevation is -19 + 9 - 8 = -18 meters, which is 18 meters below sea level.

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. For example, the absolute value of -3 is 3.

Front

How do you calculate the total number of pieces from cutting boards?

Back

To find the total number of pieces, divide the total length of the boards by the length of each piece. For example, if Morgan has three boards of 42 inches each and cuts them into pieces of 5 1/4 inches, the total number of pieces is 24.

Front

What is the formula for slope in a graph?

Back

The slope (m) is calculated as m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.

Front

What does it mean if a slope is negative?

Back

A negative slope indicates that as the x-value increases, the y-value decreases, showing a downward trend on the graph.

Front

What is the significance of the y-intercept in a linear equation?

Back

The y-intercept indicates the starting value of y when x is zero in a linear equation.

Front

How do you find the total length of multiple boards?

Back

To find the total length, multiply the number of boards by the length of each board. For example, 3 boards of 42 inches each total 126 inches.

Front

What is the process to convert a mixed number to an improper fraction?

Back

To convert a mixed number to an improper fraction, multiply the whole number by the denominator, add the numerator, and place that over the original denominator.

Front

What is the relationship between elevation and sea level?

Back

Elevation is measured as the height above or below sea level. Positive values indicate above sea level, while negative values indicate below sea level.