Jacobi knits 0.3 of a row of a scarf per minute. He keeps track of the number of rows he has completed, r, after m minutes.

Question

The equation that models this situation is given below.

Jacobi shows the relationship between the number of completed rows and the number of minutes spent knitting in the table.

Minutes Completed Rows
18
180
72
360

Find the missing numbers in the table and use them to graph the four points in the table that represent the relationship. between the number of completed rows and the number of minutes Jacobi spent knitting.

Answer 1

Using the given equation:

r = 0.3m

We can fill in the missing values in the table:

Minutes Completed Rows
18 5.4
180 54
72 21.6
360 108

To graph the four points, we plot the minutes on the x-axis and the completed rows on the y-axis.

The graph should look like this:

graph{y=0.3x [0, 400, 0, 120]}

Note that the x-axis should go up to 400 because that is the largest value of minutes given in the table.