Reflection: Exit Tickets Determine The Graph of a Proportional Relationship - Section 4: Exit Ticket


The results on the exit ticket were quite good, though there were some strange answers.  First about the good results.  I think what helped most was that I constantly remind students  about the two key features they are looking for in the graph of proportional relationships.  I suggest writing these questions on the board or newsprint to be displayed during the lesson.  

We did not spend much time talking about why the graph of a proportional relationship looks the way it does.  We will be able to discuss this issue in a fluency lesson with graphs that is a few lessons away.  

Several students (7-10)  who correctly answered #2, answered question #3 incorrectly.  They said it was not proportional because the graph was not a straight line.  I was baffled by this.  Before talking to them, I thought that perhaps they didn't realize that the lines meeting at right angles were the axes.  I thought that I should have made sure they realized this before giving the exit ticket.  I would do this in the future anyway.   I also tried to see if there was some strange effect that made the line look warped on problem #3.  

After talking to students, it turns out they they thought it wasn't straight because of the angle of the slant!  Most of the problems that we looked at appeared to have slope greater than 1.  I probably should have picked more slopes between 0 and 1.  

I showed these students  a pencil and asked if it was straight.  They said "yes".  I quickly drew an x- and y-axis and placed the pencil on the graph.  I asked if it was still straight while also changing the slope.  They said "yes".  I think they quickly understood.

  Good Exit Ticket Results - Baffling Responses to #3
  Exit Tickets: Good Exit Ticket Results - Baffling Responses to #3
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Determine The Graph of a Proportional Relationship

Unit 2: Proportional Relationships
Lesson 8 of 12

Objective: SWBAT determine if a graph represents a proportional relationship

Big Idea: Students look for two key features of graphs that are proportional.

  Print Lesson
Math, Number Sense and Operations, coordinate plane, graph of proportional relationships
  35 minutes
intersecting lines
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