SF Pre-Algebra 8.1-8.4 review

Front

What is the formula to calculate the slope between 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 from the points (3,-1) and (4,7).

Back

The slope is 8.

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 an undefined slope indicate about a line?

Back

An undefined slope indicates that the line is vertical.

Front

Write the equation of a line with slope -1 and y-intercept 0.

Back

The equation is y = -x.

Front

Find the slope from the points (2,3) and (5,9).

Back

The slope is 2.

Front

What is the slope of a line that rises 3 units for every 4 units it runs?

Back

The slope is 3/4.

Front

If a line has a slope of 1, what does this indicate about the angle of the line?

Back

A slope of 1 indicates that the line rises 1 unit for every 1 unit it runs, forming a 45-degree angle with the x-axis.

Front

What is the slope of a line that falls as it moves from left to right?

Back

The slope is negative.

Front

How do you determine the y-intercept of a line from its equation?

Back

The y-intercept is the value of y when x = 0.