Sarah read that skateboarding burns about 100 calories every 20 minutes. She made a table of values to compare time and calories burned.
Time(min) Calories Burned
20 100
40 200
60 300
80 400
100 500
Look at the table of values. Is the function described by the table linear or non-linear ?

Question

Sarah read that skateboarding burns about 100 calories every 20 minutes. She made a table of values to compare time and calories burned. 
Time(min)  Calories Burned
 20               100
40                200
60                300
80               400
100            500
Look at the table of values. Is the function described by the table linear or non-linear ?

anonymous · Answer

linear

anonymous · Answer

The sets of data directly correlate as a linear function

anonymous · Answer

why would the graph be linear ?

anonymous · Answer

It would be linear because as X (the time) increases in value so does Y (calories burned) in a direct manner. You could prove this by finding the slope by using two values of Y and two values of X but it isnt really necessary.