GED Math : Algebra

Study concepts, example questions & explanations for GED Math

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Example Questions

Example Question #21 : Linear Algebra

Suppose the slope of a line is 5, and the x-intercept is 2.   What must be the equation of the line in slope-intercept form?

Possible Answers:

Correct answer:

Explanation:

The slope intercept form is:  

The x-intercept of 2 means the point given is:  

Substitute this point and the slope to determine the value of , or the y-intercept.

Substitute this value and the slope back into .

The answer is:  

Example Question #23 : Slope Intercept Form

Rewrite the following equation to slope-intercept format:  

Possible Answers:

Correct answer:

Explanation:

The slope intercept form of a line is:  

Subtract  from both sides.

Divide by 9 on both sides.

The answer is:  

Example Question #21 : Linear Algebra

Rewrite the following equation in slope-intercept form:  

Possible Answers:

Correct answer:

Explanation:

The slope-intercept form of a line is: 

Subtract  from both sides.

Simplify both sides.

Divide by negative nine on both sides.

The equation is:  

Example Question #21 : Slope Intercept Form

Rewrite the equation in slope-intercept form.   

Possible Answers:

Correct answer:

Explanation:

The slope-intercept form is:  

Rearrange this equation.  Subtract  from both sides.

Divide by negative two on both sides.

The answer is:  

Example Question #22 : Linear Algebra

Write the equation in slope-intercept form:  

Possible Answers:

Correct answer:

Explanation:

The slope intercept form is:  

Add  on both sides.

Divide by 12 on both sides.

Reduce the fractions.

The answer is:  

Example Question #23 : Linear Algebra

Which of the following represents a linear equation in slope-intercept form?

 

Possible Answers:

Correct answer:

Explanation:

Which of the following represents a linear equation in slope-intercept form?

Slope intercept form is commonly written as:

Where m is our slope and b is our intercept. Note that m and b can be negative.

Now, we are asked to find the equation which is in slope intercept form. This means, we want an option which looks like the above form.

First, rule out anything that isn't linear. Linear equation describe a straight line, whereas other equations may be curved.

Is a quadratic equation, so it is not our answer

Is not linear either, it is a reciprocal function.

 

Thus, we are left with:

Of these, only the second is in the correct form. The first could be rearranged to be in slope-intercept form, but it is not currently.

So, our answer is:

 

Example Question #24 : Linear Algebra

What is the slope of the line ?

Possible Answers:

Correct answer:

Explanation:

Start by rewriting the equation in slope-intercept form.

Recall that in the slope intercept form,  is the slope. For the given equation, . The slope must be .

 

Example Question #22 : Linear Algebra

What is the y-intercept in the following linear equation?

Possible Answers:

Correct answer:

Explanation:

To find the y-intercept, we must have our linear equation in slope-intercept form:

, where  represents the y-intercept

Our equation is already in this form:

Therefore, our y-intercept is 

Example Question #31 : Slope Intercept Form

What is the slope in the following linear equation?

Possible Answers:

Correct answer:

Explanation:

The slope of the line is apparent when we have our equation in slope-intercept form

, where  is the slope

Put  into slope-intercept form

1)  (divide each piece by )

2) 

 

Therefore, as this equation corresponds with , we have our slope given as 

Example Question #32 : Slope Intercept Form

Which linear equation is in slope-intercept form?

Possible Answers:

Correct answer:

Explanation:

The slope-intercept form of a linear equation is represented as:

The choice that corresponds to this form is:

where  and 

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