High School Math : Pre-Algebra
Study concepts, example questions & explanations for High School Math
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Example Questions
Example Question #2 : How To Identify A Point In Pre Algebra
If the equation of a line is 
In the slope-intercept form of a line, 
It does this at 
So we plug 
Anything multiplied by 
Our coordinates for the y-intercept are 
Example Question #3 : How To Identify A Point In Pre Algebra
What is the y-intercept of the line 
In the standard form of a line 
It does this at
So we plug 
Anything multiplied by 
Our coordinates for the y-intercept are 
Example Question #4 : How To Identify A Point In Pre Algebra
What is the slope of a line that is parallel to 
Parallel lines have the same slope.
If an equation is in point-slope form, 
In this case
The slope of our parallel line is 
Example Question #1 : How To Identify A Point In Pre Algebra
Define the point based on the coordinate plane.
The point resides in quadrant I (the upper right quadrant), so both values must both be positive. The only possible solution is 
Example Question #6 : 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 point-slope form, 
In this case
First flip the sign to get 
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 #1 : Graphing Lines
What is the slope of the line with the equation 
In the standard form equation of a line, 
In this case the line 
Therefore the answer is 
Example Question #4 : Graphing Lines
What is the slope of the line 
In the slope-intercept form of a line,
In this case the line
has a slope of 
The answer is 
Example Question #5 : 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 #4 : How To Identify A Point In Pre Algebra
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 #6 : 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 
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