algebra quiz 3.4 study guide

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(-7, - 10) and (-7, 4)

0

(6,9) and (8,9)

horizontal

Decide whether a line with the given slope slants upward or downward or is horizontal or vertical: m=0

upward

Decide whether a line with the given slope slants upward or downward or is horizontal or vertical: m=8/5

change in y/change in x

Given two points of a line, slope=

M

If an equation is written in the form y = mx + b, the value of the letter — is the value of the slope of the graph.

negative

If the graph of a line moves downward from left to right, the line has — slope.

positive

If the graph of a line rises from left to right, then the slope of the line must be

25%

The grade of a road is its slope written as a percent. Find the grade of the road when it is 4 ft in height and 16 ft in width

7/8

The pitch of a roof is its slope. Find the pitch of the roof when it is 28 ft in height and 32 ft in width

zero

The slope of a horizontal line is

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The slope of any vertical line is

Slope-intercept form is best to determine if two lines are parallel or perpendicular, this form makes the slope easy to see, and slopes can be compared to determine it two lines are paralel or perpendicular

what form of the equations is best to determine if two lines are parallel or perpendicular? Why?

Solve the equation for y; the slope is the coefficient of x

what is done in order to write an equation in "slope-intercept form"? Once the equation is in slope-intercept form, how is the slope identifed?

slope

A measure of the steepness or tilt of a line is called