All Intermediate Geometry Resources
Example Questions
Example Question #91 : Lines
Which of the following points is on the line ?
Start by rewriting the equation into slope-intercept form.
To find which point is on the line, take the -coordinate, and plug it into the given equation to solve for
. If the
-value matches the
-coordinate of the same point, then the point is on the line.
Plugging in into the given equation will give the following:
Thus, is on the line.
Example Question #1371 : Intermediate Geometry
Which of the following points is found on the line ?
Start by rewriting the equation into slope-intercept form.
To find which point is on the line, take the -coordinate, and plug it into the given equation to solve for
. If the
-value matches the
-coordinate of the same point, then the point is on the line.
Plugging in into the given equation will give the following:
Thus, is on the line.
Example Question #21 : Other Lines
Which of the following points is on the line ?
Start by rewriting the equation into slope-intercept form.
To find which point is on the line, take the -coordinate, and plug it into the given equation to solve for
. If the
-value matches the
-coordinate of the same point, then the point is on the line.
Plugging in into the given equation will give the following:
Thus, is on the line.
Example Question #1371 : Intermediate Geometry
Which of the following points is on the line ?
Start by rewriting the equation into slope-intercept form.
To find which point is on the line, take the -coordinate, and plug it into the given equation to solve for
. If the
-value matches the
-coordinate of the same point, then the point is on the line.
Plugging in into the given equation will give the following:
Thus, is on the line.
Example Question #91 : Coordinate Geometry
Which of the following points is found on the line ?
Start by rewriting the equation into slope-intercept form.
To find which point is on the line, take the -coordinate, and plug it into the given equation to solve for
. If the
-value matches the
-coordinate of the same point, then the point is on the line.
Plugging in into the given equation will give the following:
Thus, is on the line.
Example Question #91 : Lines
True or false:
The line of the equation passes through the point with coordinates
.
True
False
False
A line of an equation passes through the point with coordinates if and only if, when
, the equation is true. Substitute for
and
:
- this is false.
The line does not pass through the point.
Example Question #92 : Lines
True or false:
The line of the equation passes through the origin.
False
True
True
The coordinates of the origin are , so the line of an equation passes through this point of and only if
is a solution of the equation - or, equivalently, if and only if setting
and
makes the equation a true statement. Substitute both values:
The statement is true, so the line does pass through the origin.
Example Question #1383 : Intermediate Geometry
True or false:
The lines of the equations
and
intersect at the point .
(Note: You are given that the lines are distinct)
False
True
False
If two distinct lines intersect at the point - that is, if both pass through this point - it follows that
is a solution of the equations of both. Therefore, set
in the equations and determine whether they are true or not.
Examine the second equation:
False; is not on the line of this equation.
Therefore, the lines cannot intersect at .
Example Question #1 : How To Find The Equation Of A Line
Given two points and
, find the equation for the line connecting those two points in slope-intercept form.
If we have two points, we can find the slope of the line between them by using the definition of the slope:
where the triangle is the greek letter 'Delta', and is used as a symbol for 'difference' or 'change in'
Now that we have our slope ( , simplified to
), we can write the equation for slope-intercept form:
where
is the slope and
is the y-intercept
In order to find the y-intercept, we simply plug in one of the points on our line
So our equation looks like
Example Question #2 : How To Find The Equation Of A Line
Which of the following is an equation for a line with a slope of and a y-intercept of
?
Because we have the desired slope and the y-intercept, we can easily write this as an equation in slope-intercept form (y=mx+b).
This gives us . Because this does not match either of the answers in this form (y=mx+b), we must solve the equation for x. Adding 5 to each side gives us
. We can then multiple both sides by 3 and divide both sides by 4, giving us
.
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