Max value of x+y (solving a linear system)?

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SUMMARY

The discussion centers on determining the maximum value of the expression x+y for a line passing through the point (3,4). The user initially sets up a system of equations using the slope-intercept form, y = mx + b, but concludes that there is no maximum value for x+y since both x and y can extend infinitely. The consensus is that the only logical answer is "infinity," indicating a misunderstanding of the problem's constraints.

PREREQUISITES
  • Understanding of linear equations and the slope-intercept form (y = mx + b)
  • Familiarity with systems of equations
  • Basic knowledge of coordinate geometry
  • Concept of limits in mathematical analysis
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  • Study the properties of linear equations and their graphical representations
  • Learn about constraints in optimization problems
  • Explore the concept of limits and infinity in calculus
  • Investigate how to set up and solve systems of equations effectively
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Students studying algebra, particularly those tackling linear equations and optimization problems, as well as educators looking for examples of common misunderstandings in mathematical concepts.

holezch
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Homework Statement



A line passes through (3,4). What is the maximum value of x+y?

Homework Equations


y = mx + b

The Attempt at a Solution



So I set up a system of equations, m3+b =4; b = Y; mX + b = 0. Then I plugged my values for X and Y into m3+b = 4..
The weird thing is though... there is no maximum value of x+y?? It's just a line, x or y could go out further and further to infinity
How should I solve this? Thanks
 
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As you say, the only solution that makes sense here is "infinity". Are you sure you have the question right?
 

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