HSPT Math : Concepts

Study concepts, example questions & explanations for HSPT Math

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Example Questions

Example Question #1 : Midpoint Formula

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 ?

Possible Answers:

Correct answer:

Explanation:

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 #2 : How To Find The Endpoints Of A Line Segment

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  ?

Possible Answers:

Correct answer:

Explanation:

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 #291 : Geometry

Two perpendicular lines intersect at the point . One line passes through point ; the other passes through point . Evaluate .

Possible Answers:

Correct answer:

Explanation:

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  ?

Possible Answers:

Correct answer:

Explanation:

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 #4 : Use Similar Triangles To Show Equal Slopes: Ccss.Math.Content.8.Ee.B.6

Give the -intercept, if there is one, of the graph of the equation

Possible Answers:

The graph has no -intercept.

Correct answer:

The graph has no -intercept.

Explanation:

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 #5 : Use Similar Triangles To Show Equal Slopes: Ccss.Math.Content.8.Ee.B.6

Give the -intercept, if there is one, of the graph of the equation

Possible Answers:

The graph has no -intercept.

Correct answer:

Explanation:

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 #2 : How To Find X Or Y Intercept

Give the -intercept, if there is one, of the graph of the equation

.

Possible Answers:

The graph does not have a -intercept.

Correct answer:

Explanation:

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 #286 : Geometry

Give the slope of the line that passes through  and .

Possible Answers:

Correct answer:

Explanation:

Use the slope formula, substituting :

Example Question #281 : Geometry

What is the slope of the line that passes through and ?

Possible Answers:

Correct answer:

Explanation:

We can use the slope formula:

 

Example Question #282 : Geometry

What is the slope of the line that passes through  and ?

Possible Answers:

Correct answer:

Explanation:

We can use the slope formula:

 

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