If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

### Course: 7th grade>Unit 1

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.
• 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
• k for constant 👍
• my question is why people say sheesh
• Sheesh!
• 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.
• 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).
• and when do we use this in life?