District Assessment Review: Day 5

Front

What is the formula to calculate the slope of a line given two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated using the formula: m = (y2 - y1) / (x2 - x1).

Front

Find the slope of the line that passes through the points (-4, 7) and (-6, -4).

Back

The slope is 11/2.

Front

What is direct variation?

Back

Direct variation is a relationship between two variables where one is a constant multiple of the other, expressed as y = kx, where k is a non-zero constant.

Front

Does the equation y = 3x + 2 represent direct variation?

Back

No, because it has a constant term (2) that prevents it from being in the form y = kx.

Front

What does the correlation coefficient (r) indicate in statistics?

Back

The correlation coefficient (r) measures the strength and direction of a linear relationship between two variables.

Front

Which value of r indicates the weakest best fit for the data?

Back

The value 0.01 indicates the weakest best fit.

Front

Find the slope of the line that passes through the points (-3, -4) and (7, 6).

Back

The slope is 1.

Front

What does it mean if the slope of a line is undefined?

Back

An undefined slope indicates a vertical line, where the change in x is zero.

Front

What is the significance of a slope of 0?

Back

A slope of 0 indicates a horizontal line, where the change in y is zero.

Front

Back

The value of x that makes the equation true is -56.