Pre-Algebra : Graphing
Study concepts, example questions & explanations for Pre-Algebra
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Example Questions
Example Question #3 : Graphing Lines
What is the y-intercept of the line 
In the slope-intercept form of a line, 
It does this at 
So we plug 
to give us
Anything multiplied by 
Our coordinates for the y-intercept are 
Example Question #3 : Graphing Lines
What is the slope of a line that is parallel to 
Parallel lines have the same slope.
If an equation is in slope-intercept form, 
In this case 
The slope of our parallel line is 
Example Question #4 : Graphing Lines
What is the slope of the line that contains the points, 
To find the slope of a line with two points you must properly plug the points into the slope equation for two points which looks like
We must then properly assign the points to the equation as 
In this case we will make 
Plugging the points into the equation yields
Perform the math to arrive at
The answer is 
Example Question #3 : Graphing Lines
What is the slope of the line that contains the points, 
To find the slope of a line with two points you must properly plug the points into the slope equation for two points which looks like
We must then properly assign the points to the equation as
In this case we will make 
Plugging the points into the equation yields
Perform the math to arrive at
The answer is 
Example Question #11 : How To Identify A Point In Pre Algebra
What is the slope of a line that is perpendicular to 
The slope of a perpendicular lines has the negative reciprocal of the slope of the original line.
If an equation is in slope-intercept form,
In this case
First flip the sign
To find the reciprocal you take the integer and make it a fraction by placing a 
Do this to make the slope
The slope of the perpendicular line is
Example Question #42 : Graphing
What is the slope of the following line:
To be able to identify the slope of a line, we need to get it in the form of
To do this we need to change the coefficient of y to be 
Now we can tell what the value of m, or the slope, is:
Example Question #43 : Graphing
The slope of the line is determined by 
Let's choose the coordinate 
We can now use the formula above:
Example Question #44 : Graphing
What is the slope of a line containing the points 
The formula to calculate slope between two points in a line is 
If we pick 
This simplifies to 
Example Question #11 : Graphing Lines
What is the slope-intercept form of a line?
The slope-intercept form of a line is 
Example Question #12 : Graphing Lines
Which of the follow lines is parallel to:
Cannot be determined
It is known that parallel lines have the same slope and therefore a line that is parallel to:
MUST have the same slope of 
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