Slope and Constant of Proportionality REVIEW

Front

What is the equation for a proportional relationship where y = 8x?

Back

The equation represents a constant of proportionality of 8.

Front

How do you calculate the constant of proportionality from a table of values?

Back

Divide the value of y by the value of x for any point (x, y) in the table.

Front

Write an equation for a situation where the constant of proportionality is 19.25.

Back

The equation is y = 19.25x.

Front

What is the slope of a line that rises 5 units for every 2 units it runs?

Back

The slope is 5/2.

Front

What is the x-axis?

Back

The x-axis is the horizontal line on a graph where y = 0.

Front

What does a slope of 0 indicate about a line?

Back

A slope of 0 indicates that the line is horizontal.

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that the line is decreasing as it moves from left to right.

Front

If the slope of a line is 2, what is the constant of proportionality?

Back

The constant of proportionality is also 2.

Front

How do you identify the slope from a graph?

Back

The slope is the ratio of the rise (change in y) to the run (change in x) between two points on the line.

Front

What is the formula for slope?

Back

The formula for slope (m) is m = (y2 - y1) / (x2 - x1).