Math Problem Statement

The graphs of two linear equations are shown above. The graph of 𝑦=𝑓(π‘₯) is in green and the graph of 𝑦=𝑔(π‘₯) is in blue. Find the interval where 𝑓(π‘₯)β‰₯𝑔(π‘₯) . Write your answer in interval notation or as an inequality. For example, if you think that the solution is π‘₯<=βˆ’7 , you would this or enter (βˆ’π‘–π‘›π‘“,βˆ’7]

The graphs of two linear equations are shown above. The graph of y = f(x) is in green and the graph of y = g(x) is in blue. Find the interval where f(x) β‰₯ g(x). Write your answer in interval notation or as an inequality. For example, if you think that the solution is x <= βˆ’7, you would this or enter (βˆ’βˆž,βˆ’7].

Solution

To find the interval where f(x)β‰₯g(x)f(x) \geq g(x), let's analyze the graph and focus on the intersection and behavior of the two functions.

  1. Intersection point: The graphs of f(x)f(x) (green) and g(x)g(x) (blue) intersect at approximately (x=1,y=2)(x = 1, y = 2). This is the point where f(x)=g(x)f(x) = g(x).

  2. Behavior of the functions:

    • To the left of the intersection point (for x<1x < 1): The green line (representing f(x)f(x)) is above the blue line (representing g(x)g(x)). Hence, f(x)>g(x)f(x) > g(x).
    • To the right of the intersection point (for x>1x > 1): The green line is below the blue line, meaning f(x)<g(x)f(x) < g(x).

Thus, the interval where f(x)β‰₯g(x)f(x) \geq g(x) occurs when x≀1x \leq 1, including the point where they intersect.

Final Answer:

The solution is (βˆ’βˆž,1](-\infty, 1].

Would you like more details on how to interpret the graph or solve this?

Here are five questions to expand this concept:

  1. How do you find the intersection points of two linear equations algebraically?
  2. How can you determine the slopes of linear functions from a graph?
  3. What does it mean when one function is above another on a graph?
  4. How do you express inequalities in interval notation?
  5. What role does the intersection point play in solving inequalities involving two functions?

Tip: When working with graphs of functions, always focus on key points like intersections and the behavior of the functions on either side of these points.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graph Analysis
Inequalities

Formulas

y = mx + b (linear equation form)
Interval notation

Theorems

Intersection of two lines
Comparing functions

Suitable Grade Level

Grades 8-10