What is the equation of the line which includes the points (– 5, 2), (6, 2), (

Which of the following points is not on the line y = 7x + 2?

Possible Answers:

Explanation:

To find out if a point (x, y) is on the graph of a line, we plug in the values and see if we get a true statement, such as 10 = 10. If we get something different, like 6 = 4, we know that the point is not on the line because it does not satisfy the equation. In the given choices, when we plug in (1, 10) we get 10 = 7 + 2, which is false, making this is the desired answer.

y = 7x + 2

(2, 16) gives 16 = 7(2) + 2 = 14 + 2 = 16

(–1, –5) gives –5 = 7(–1) + 2 = –7 + 2 = –5

(0, 2) gives 2 = 7(0) + 2 = 0 + 2 = 2

(–2, –12) gives –12 = 7(–2) + 2 = –14 + 2 = –12

All of these are true.

(1, 10) gives 10 = 7(1) + 2 = 7 + 2 = 9

10 = 9 is a false statement.

Which point is on the line

Possible Answers:

Correct answer:

Explanation:

To determine whether a point is on a line, simply plug the points back into the equation. When we plug in (2,7) into the equation of

and

respectively, the equation works out, which indicates that the point is located on the line.

Which of the following statements is incorrect?

Possible Answers:

is perpendicular to

The points

and

lie on the line

The lines

and

are parallel.

and

both fall on the line

Correct answer:

and both fall on the line .

Explanation:

Lines that have the same slope are parallel (unless the two lines are identical) and lines with slopes that are opposite-reciprocals are perpendicular. So, the only statements left to evaluate are the two that contain a set of points.

Consider

and

So the slope, or

, is 2.

Plugging the point

into the half-finished equation

gives us a

value of

. So that statement is true and the only one that could be the answer is the statement containing

and

Let's check it just in case.

gives us a slope value of 6, so we can already tell the equation for the line will not be

. We have found our answer.

Which of these lines go through the point (6,5) on an xy-coordinate plane?

Possible Answers:

None of the other answers

Correct answer:

Explanation:

To find out if a point is on a line, you can plug the points back into an equation. If the values equal one another, then the point must be on a line. In this case, the only equation where (6,5) would correctly fit as an

value is

Which of the following points are on the line described by the equation?

Possible Answers:

Two of these answer choices are correct.

Correct answer:

Two of these answer choices are correct.

Explanation:

The easiest way to find out if a point falls on a specific line is to plug the first value of the point in for

and the second value for

If we do this for

, we find that

which is true.

The equation also holds true for

, but is false for the other values. So, two of the answer choices are correct.

Which of the following ordered pairs lies on the line given by the equation

Possible Answers:

Correct answer:

Explanation:

To determine which ordered pair satisfies the equation, it would help to rearrange the equation to slope-intercept form.

Then, plug in each ordered pair and see if it satisfies the equation. We are looking for an

value that produces the desired

answer.

satisfies the equation. All of the other points do not.

(Note: you could also use the original equation in standard form).

The point (3,2) is located on which of these lines?

Possible Answers:

Correct answer:

Explanation:

To determine whether a point is on a line, you can plug it into the equation to see if the equation remains valid/equal with the point.

Plugging the point (3,2) into the equation

gives you

which works out. None of the other equations would remain equal after pluggin in (3,2).

The point (2,7) lies on which of these lines?

Possible Answers:

Correct answer:

Explanation:

To determine whether a point is located in a given line, simply plug in the coordinates of the point into the line. In this case, plugging in the coordinates into the only line where you can plug in the coordinates and have a valid equation is

. Plugging in (2,7) would give you an equation of

, which works out to

Which of these points fall on the graph of the line

Possible Answers:

Two of these points fall on the graph of this equation.

All three of these points fall on the graph of this equation.

Correct answer:

All three of these points fall on the graph of this equation.

Explanation:

To find out if a point is on a line with an equation, we just need to substitute in the point's

and

values and see if the equation holds true. For example, let's look at the point

. Substitution into the equation gives us

, which is true.

So, this point does fall on the line. Doing the same with the other two points shows us that yes, all three of them fall on the line expressed by this equation.

Which point is on the line

Possible Answers:

Correct answer:

Explanation:

To determine if a point is on a line you can simply subsitute the x and y coordinates into the equation. Another way to solve the problem would be to graph the line and see if it falls on the line. Plugging in

will give

which is a true statement, so it is on the line.

Zachary
Certified Tutor

Dartmouth College, Bachelor in Arts, Political Science and Government. University of Toronto, Master of Arts, Political Scien...

Robert
Certified Tutor

St. John's University, Bachelors, Physics.

Temiloluwa
Certified Tutor

University of Georgia, Bachelor of Science, Biochemistry and Molecular Biology.

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