Through Which Points Does the Graph of x = y - 4 + 2x Pass?

Linear Equations with Variable Isolation

Look at the following function:

x=y4+2x x=y-4+2x

Through which of the following points does the graph of the function pass?

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find through which points the function passes
00:03 Let's arrange the function, isolate Y
00:16 This is the function equation
00:19 In each point, the left number represents X-axis and the right Y
00:23 Let's substitute each point in the line equation and see if possible
00:31 Possible, therefore the point is on the line
00:34 Let's use the same method and find which points are on the line
00:37 Moving to the second point, let's substitute in the line equation
00:42 Not possible, therefore the point is not on the line
00:45 Moving to the third point, let's substitute in the line equation
00:51 Not possible, therefore the point is not on the line
00:54 Moving to the fourth point, let's substitute in the line equation
01:05 Not possible, therefore the point is not on the line
01:08 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Look at the following function:

x=y4+2x x=y-4+2x

Through which of the following points does the graph of the function pass?

2

Step-by-step solution

To determine through which point the function passes, we begin by simplifying the given equation.

Given: x=y4+2x x = y - 4 + 2x

Rearranging the terms to solve for y y :

x=y4+2x x = y - 4 + 2x

Subtract x x from both sides to isolate the terms involving y y :

0=y4+x 0 = y - 4 + x

Rearrange to solve for y y :

y=x+4 y = -x + 4

Now, we will test each point to see which satisfies the equation y=x+4 y = -x + 4 .

  • For (1,5) (-1, 5) , substitute x=1 x = -1 :
  • y=(1)+4=1+4=5 y = -(-1) + 4 = 1 + 4 = 5

    This point satisfies the equation.

  • For (0,5) (0, 5) , substitute x=0 x = 0 :
  • y=(0)+4=4 y = -(0) + 4 = 4

    This point does not satisfy the equation.

  • For (1,5) (1, 5) , substitute x=1 x = 1 :
  • y=(1)+4=1+4=3 y = -(1) + 4 = -1 + 4 = 3

    This point does not satisfy the equation.

  • For (2,5) (2, 5) , substitute x=2 x = 2 :
  • y=(2)+4=2+4=2 y = -(2) + 4 = -2 + 4 = 2

    This point does not satisfy the equation.

Therefore, the graph of the function passes through the point (1,5)(-1, 5).

3

Final Answer

(1,5) (-1,5)

Key Points to Remember

Essential concepts to master this topic
  • Simplification: Combine like terms by moving all x terms together
  • Technique: Subtract x from both sides: x = y - 4 + 2x becomes 0 = y - 4 + x
  • Check: Substitute point coordinates into simplified equation y = -x + 4 ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to combine like terms with x
    Don't leave the equation as x = y - 4 + 2x and try to substitute points directly = confusing results! This creates an equation with x on both sides that's hard to work with. Always combine like terms first by moving all x terms to one side.

Practice Quiz

Test your knowledge with interactive questions

Which statement best describes the graph below?

xy

FAQ

Everything you need to know about this question

Why can't I just substitute points into the original equation?

+

You could, but it's much harder! With x on both sides, you'd need to solve for one variable each time. Simplifying to y=x+4 y = -x + 4 first makes checking points much easier.

How do I know which variable to solve for?

+

Usually solve for y because it gives you the familiar y=mx+b y = mx + b form. This makes it easy to substitute x-values and check if you get the correct y-values.

What if I get 0 = 0 when combining like terms?

+

That means the equation is an identity - it's true for all points! But that's not the case here since we got y=x+4 y = -x + 4 , which represents a specific line.

Why does only (-1, 5) work when y = 5 for all options?

+

Great observation! Since all points have y=5 y = 5 , we need 5=x+4 5 = -x + 4 . Solving: x=1 x = -1 . So only (-1, 5) satisfies our equation.

Can I check my answer by plugging back into the original equation?

+

Absolutely! For (-1, 5): 1=54+2(1)=542=1 -1 = 5 - 4 + 2(-1) = 5 - 4 - 2 = -1 ✓. This confirms our simplified equation was correct.

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Linear Functions questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations