Question
upstudy study bank question image url

The point where the graphs of two linear equations intersect has a \( y \)-coordinate of 4 . One equation is \[ y=-2 x+2 \text {. Find the other equation if its graph has a slope of } 3 \text {. } \] What is the equation of the line with a slope of 3 that intersects the line with the equation \[ y=-2 x+2 \text { ? Solve on paper, and then enter your answer on Zearn. } \]

Ask by Bates Wood. in the United States
Mar 13,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

The equation of the line is \( y = 3x + 7 \).

Solution

1. We are given that the graphs have an intersection point with a \( y \)-coordinate of 4. The first equation is \[ y = -2x + 2. \] Substitute \( y = 4 \) into this equation to find the \( x \)-coordinate: \[ 4 = -2x + 2. \] 2. Solve for \( x \): \[ 4 - 2 = -2x \quad \Longrightarrow \quad 2 = -2x. \] Divide both sides by \(-2\): \[ x = -1. \] So, the intersection point is \((-1, 4)\). 3. The second line has a slope of 3 and passes through the point \((-1, 4)\). Using the point-slope form: \[ y - y_1 = m(x - x_1), \] substitute \( m = 3 \), \( x_1 = -1 \), and \( y_1 = 4 \): \[ y - 4 = 3(x - (-1)) \quad \Longrightarrow \quad y - 4 = 3(x + 1). \] 4. Simplify the equation: \[ y - 4 = 3x + 3. \] Add 4 to both sides: \[ y = 3x + 7. \] The equation of the line is \( y = 3x + 7 \).

Answered by UpStudy AI and reviewed by a Professional Tutor

error msg
Explain
Simplify this solution

Beyond the Answer

To find the equation of the line with a slope of 3 that intersects \( y = -2x + 2 \) at a \( y \)-coordinate of 4, we start by using the point-slope form of a linear equation, which is written as: \[ y - y_1 = m (x - x_1) \] Given that the slope \( m \) is 3, and the intersecting point has coordinates \( (x, 4) \), we can derive \( x \) from the first equation at \( y = 4 \): Setting \( y = 4 \) in \( y = -2x + 2 \): \[ 4 = -2x + 2 \] Solving for \( x \): \[ 4 - 2 = -2x \] \[ 2 = -2x \] \[ x = -1 \] Now, we know the intersection point is \( (-1, 4) \). Let's use this point in the point-slope form equation: \[ y - 4 = 3(x + 1) \] Expanding and simplifying it: \[ y - 4 = 3x + 3 \] \[ y = 3x + 7 \] So the other equation is: \[ y = 3x + 7 \]

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy