Graphing Lines

Front

What is the formula for slope?

Back

Slope (m) = rise/run.

Front

In the slope-intercept form y=mx+b, what does 'b' represent?

Back

'b' represents the y-intercept.

Front

How do you find the y-intercept from the equation y=mx+b?

Back

Set x=0 and solve for y.

Front

What does a slope of 0 indicate about a line?

Back

The line is horizontal.

Front

What does an undefined slope indicate about a line?

Back

The line is vertical.

Front

How do you graph a line using slope-intercept form?

Back

Graph the y-intercept first, then use the slope to find another point.

Front

What is the slope of the line represented by the equation y=3x+2?

Back

The slope is 3.

Front

If a line has a slope of -2, what does this indicate about its direction?

Back

The line descends from left to right.

Front

What is the slope of a line that goes through the points (2,3) and (4,7)?

Back

Slope = (7-3)/(4-2) = 2.

Front

What is the slope of a line that is perfectly vertical?

Back

The slope is undefined.