Jamilla collected data comparing the weight and cost of pieces of sterling silver jewelry. Her data is listed as (weight in ounces, cost in dollars): $\left(5, 44.00\right)$, $\left(8.5, 78.50\right)$, $\left(12, 112.00\right)$, $\left(10, 93.00\right)$, $\left(7, 63.50\right)$, $\left(9, 83.20\right)$.

1. Plot the data on a set of axes.  

2. Use a ruler to draw a line that best approximates the data.

3. Determine the equation of the line of best fit drawn in (b).

4. Use your equation to predict the cost of a $50$-ounce silver bracelet.

   Use eTool below to solve the parts of this problem.
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