GED Math : Geometry and Graphs

Study concepts, example questions & explanations for GED Math

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Example Questions

Example Question #2 : Slope

Find the slope of the equation:  

Possible Answers:

Correct answer:

Explanation:

To determine the slope, we will need the equation in slope-intercept form.

Subtract  from both sides.

Divide by negative three on both sides.

The slope is:  

Example Question #2 : Slope

What is the slope of the line defined as ?

Possible Answers:

Cannot be computed from the data provided

Correct answer:

Explanation:

There are two ways that you can do a problem like this.  First you could calculate the slope from two points.  You would do this by first choosing two values and then using the slope formula, namely:

This could take some time, however.  You could also solve it by using the slope intercept form of the equation, which is:

If you get your equation into this form, you just need to look at the coefficient .  This will give you all that you need for knowing the slope.

Your equation is:

What you need to do is isolate :

Notice that this is the same as:

The next operation confuses some folks.  However, it is very simple.  Just divide everything by .  This gives you:

Now, take the coefficient from .  It is .  

You can reduce this to.  This is your slope.

Example Question #731 : Geometry And Graphs

Find the slope of the following line:

Possible Answers:

Correct answer:

Explanation:

To find the slope of a line, we will look at the line in slope-intercept form:

where m is the slope and b is the y-intercept.

Now, given the line

we can see that .

Therefore, the slope of the line is -8.

Example Question #732 : Geometry And Graphs

Line

Give the slope of the above line.

Possible Answers:

Correct answer:

Explanation:

The slope of a line is defined to be the ratio of rise (vertical change, or change in the value of ) to run (horizontal change, or change in the value of  ). 

The -intercept of the line can be seen to be at the point five units above the origin, which is . The -intercept is at the point three units to the right of the origin, which is . From these intercepts, we can find slope  by setting  in the formula

The slope is

Example Question #11 : Slope

What is the slope of the following line?  

Possible Answers:

Correct answer:

Explanation:

Rearrange the terms so that it's in slope-intercept form.

The slope is the .  Add three on both sides.

Subtract  from both sides.

The answer is:  

Example Question #733 : Geometry And Graphs

Determine the slope of the line:  

Possible Answers:

Correct answer:

Explanation:

The equation will need to be rearranged to slope-intercept form.

Add  on both sides.

Subtract two on both sides, and add  on both sides to isolate the  variable.

Combine like-terms.

The slope is the coefficient .

The answer is:  

Example Question #11 : Slope

Determine the slope of the following line:  

Possible Answers:

Correct answer:

Explanation:

The following equation is NOT in the proper point-slope format:

Simplify the equation by expanding the right side.

Add 3 on both sides.

The equation is now in slope-intercept format.

The slope is .

Example Question #734 : Geometry And Graphs

Given the points  and , what is the slope of the line connecting the two points?

Possible Answers:

Correct answer:

Explanation:

Write the formula for slope.

The slope is:  

Example Question #11 : Slope

Find the missing x-coordinate of the point  if it lies on a line with  with a slope of .

Possible Answers:

Correct answer:

Explanation:

Recall how to find the slope of a line:

Plug in the given points to solve for .

The missing x-coordinate is .

Example Question #12 : Slope

What is the slope of the following line?  

Possible Answers:

Correct answer:

Explanation:

The equation is not in slope-intercept form:  

Rearrange the terms so that it is in that form.

Subtract  on both sides.

Divide by negative 8 on both sides.

Simplify both fractions.

The slope is:  

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