Semester Exam Math Plus

Front

What is the formula to find the slope of a line?

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

If the area of a square is 81 cm², what is the formula to find the side length?

Back

The side length (s) of a square can be found using the formula s = √(Area). For an area of 81 cm², s = √81 = 9 cm.

Front

What does a negative slope indicate about a line?

Back

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

Front

How do you interpret a scatter plot?

Back

A scatter plot shows the relationship between two variables. The trend line can help predict values based on the observed data.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, represented as (0, b) in the equation y = mx + b.

Front

What is the relationship between the area of a square and its side length?

Back

The area of a square is directly proportional to the square of its side length, given by the formula Area = s².

Front

How can you find the slope from a graph?

Back

To find the slope from a graph, select two points on the line, determine their coordinates, and use the slope formula m = (y2 - y1) / (x2 - x1).

Front

What does it mean if a slope is zero?

Back

A slope of zero means the line is horizontal, indicating that there is no change in the y-value as the x-value changes.

Front

What is the significance of the trend line in a scatter plot?

Back

The trend line summarizes the overall direction of the data points and can be used to make predictions about future data.

Front

How do you calculate the area of a square?

Back

The area of a square is calculated using the formula Area = side length × side length.