GED Math : Slope-Intercept Form

Study concepts, example questions & explanations for GED Math

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Example Questions

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Example Question #1 :Slope Intercept Form

Which of the following equations is written in slope-intercept form?

Possible Answers:

Correct answer:

Explanation:

Slope-intercept form is written as.

There is only one answer choice in this form:

Example Question #1 :Slope Intercept Form

Rewrite the following equation in slope-intercept form.

Possible Answers:

Correct answer:

Explanation:

The slope-intercept form of a line is:, whereis the slope andis the y intercept.

Below are the steps to get the equation成斜截式。

Example Question #1 :Slope Intercept Form

Line

Refer to the above red line. What is its equation in slope-intercept form?

Possible Answers:

Correct answer:

Explanation:

First, we need to find the slope of the above line.

Given two points,, the slope can be calculated using the following formula:

Set:

Second, we note that the-intercept is the point.

Therefore, in the slope-intercept form of a line, we can setand:

Example Question #1 :Slope Intercept Form

What is the y-intercept of the line with the following equation:

Possible Answers:

Correct answer:

Explanation:

There are two ways that you can find the y-intercept for an equation. You could substitutein for. This would give you:

Simplifying, you get:

However, another way to do this is by finding the slope-intercept form of the line. You do this by solving for:

Just divide everything by:

Remember that the slope-intercept form gives you the intercept as the final constant. Hence, it isas well!

Example Question #5 :Slope Intercept Form

What is the y-intercept for the following equation:

Possible Answers:

Correct answer:

Explanation:

There are two ways that you can find the y-intercept for an equation. You could substitutein for. This would give you:

Simplifying, you get:

However, another way to do this is by finding the slope-intercept form of the line. You do this by solving for. Indeed, this is very, very easy. Recall that the slope intercept form is:

This means that, as written, your equation obviously has. You don't even have to do all of the simplification!

Example Question #6 :Slope Intercept Form

What is the equation of the line betweenand?

Possible Answers:

Correct answer:

Explanation:

In order to figure this out, you should use your slope-intercept formula. Remember that the y-intercept is the place whereis zero. Therefore, the pointgives you your y-intercept. It is. Now, to find the slope, recall the slope equation, namely:

For your points, this would be:

This is your slope.

Now, recall that the point-slope form of an equation is:

, whereis your slope andis your y-intercept

Thus, your equation will be:

Example Question #1 :Linear Algebra

Which of the following equations has a slope of?

Possible Answers:

Correct answer:

Explanation:

In order to compute the slope of a line, there are several tools you can use. For this question, try to use the slope-intercept form of a line. Once you get the equation into this form, you basically can "read off" the slope right from the equation! Recall that the slope-intercept form of an equation is:

Now, looking at each of your options, you know that you can eliminate two immediately, as their slopesobviouslyare not:

The next is almost as easy:

When you solve for, your coefficient value foris definitelynotequal to:

Next,is not correct either. When you start to solve, you should notice thatwill always have a negative coefficient. This means that it certainly will not becomewhen you finish out the simplification.

Thus, the correct answer is:

Really, all you have to pay attention to is theterm. First, you will subtractfrom both sides:

Then, just divide by, and you will have!

Example Question #1 :Slope Intercept Form

Rewrite the equation in slope-intercept form:

Possible Answers:

Correct answer:

Explanation:

In order to rewrite the equation in slope-intercept form, we will need to multiply the reciprocal of the coefficient in front of y.

Simplify both sides.

The answer is:

Example Question #2 :Slope Intercept Form

Write the equation in slope-intercept form:

Possible Answers:

Correct answer:

Explanation:

The slope-intercept form is:

Subtracton both sides.

Divide by negative six on both sides.

Simplify both sides.

The answer is:

Example Question #10 :Slope Intercept Form

Write the equation in slope-intercept form:

Possible Answers:

Correct answer:

Explanation:

Slope intercept form is.

Addon both sides.

Multiply by three on both sides.

The answer is:

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