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Lesson 4: Graphs of proportional relationships

# Interpreting graphs of proportional relationships

Worked example interpreting graphs of proportional relationships.

## Want to join the conversation?

• whats the diffrence between linear and porportional
• linear means it is a line proportional means it is a line that goes to (0,0)
• It looks impossible for mankind to be able to invent such a complex world of math while everything fits together and makes sense. While not having any mistakes.
• I agree, I can only study what's already invented I feel like my mind can't go beyond that to discover or make more math. it makes u wonder how their brains worked, what they were thinking, considering when making these concepts.
• my question is why people say sheesh
• Sheesh!
• k for constant 👍
• whats the difference between linear and porportional
• Linear lines are straight lines on a graph

proportional lines are straight lines on a graph that start at the origin

also linear lines are defined by the equation y = mx + b

proportional lines are defined by the equation y = kx

hope this helped
• how would i do this on a bigger graph in the thousands
• There are two ways to scale a graph, instead of going by 0, 1, 2, 3 (and negatives to the left or down), the scale can be changed to 0, 1000, 2000, 3000, etc, including negatives without even having to change the size of the graph. The other option is to define each of the x and y axis in terms of larger numbers such as x represents dollars (in thousands).
• Hello? Anybody here? All these comments are really old.
• If you hit the sort by button above the comments you will see comments from a little more recently.
• What does the K mean in this Question?