All HSPT Math Resources
Example Questions
Example Question #1 : How To Find The Endpoints Of A Line Segment
A line segment on the coordinate plane has midpoint . One of its endpoints is
. What is the
-coordinate of the other endpoint, in terms of
and/or
?
Let be the
-coordinate of the other endpoint. Since the
-coordinate of the midpoint of the segment is the mean of those of the endpoints, we can set up an equation as follows:
Example Question #171 : Geometry
A line segment on the coordinate plane has one endpoint at ; its midpoint is
. Which of the following gives the
-coordinate of its other endpoint in terms of
and
?
To find the value of the -coordinate of the other endpoint, we will assign the variable
. Then, since the
-coordinate of the midpoint of the segment is the mean of those of its endpoints, the equation that we can set up is
.
We solve for :
Example Question #1 : How To Find Out If Lines Are Perpendicular
Two perpendicular lines intersect at the point . One line passes through point
; the other passes through point
. Evaluate
.
The line that passes through and
has slope
.
The line that passes through and
, being perpendicular to the first, has as its slope the opposite reciprocal of
, or
.
Therefore, to find , we use the slope formula and solve for
:
Example Question #1 : How To Find X Or Y Intercept
What is the -intercept of the graph of the function
?
The -intercept of the graph of a function is the point at which it intersects the
-axis - that is, at which
. This point is
, so evaluate
:
The -intercept is
.
Example Question #1 : How To Find X Or Y Intercept
Give the -intercept, if there is one, of the graph of the equation
The graph has no -intercept.
The graph has no -intercept.
The -intercept is the point at which the graph crosses the
-axis; at this point, the
-coordinate is 0, so substitute
for
in the equation:
However, since this expression has 0 in a denominator, it is of undefined value. This means that there is no value of paired with
-coordinate 0, and, subsequently, the graph of the equation has no
-intercept.
Example Question #2 : How To Find X Or Y Intercept
Give the -intercept, if there is one, of the graph of the equation
The graph has no -intercept.
The -intercept is the point at which the graph crosses the
-axis; at this point, the
-coordinate is 0, so substitute
for
in the equation:
The -intercept is
.
Example Question #3 : How To Find X Or Y Intercept
Give the -intercept, if there is one, of the graph of the equation
.
The graph does not have a -intercept.
The -intercept is the point at which the graph crosses the
-axis; at this point, the
-coordinate is 0, so substitute
for
in the equation:
The -intercept is the point
.
Example Question #281 : Geometry
Give the slope of the line that passes through and
.
Use the slope formula, substituting :
Example Question #282 : Geometry
What is the slope of the line that passes through and
?
We can use the slope formula:
Example Question #283 : Geometry
What is the slope of the line that passes through and
?
We can use the slope formula:
Certified Tutor
Certified Tutor
All HSPT Math Resources
