Question

jacob has a part - time job at an ice skating rink selling hot cocoa. he decided to plot the number of hot cocoas he sold relative to the days high temperature and then draw the line of best fit. based on the line of best fit, what would you predict the days high temperature to be if jacob sold 89 hot cocoas?

Explanation:

Step1: Assume the line of best - fit equation

Let the equation of the line of best - fit be $y = mx + b$, where $y$ is the number of hot cocoas sold and $x$ is the high temperature. We need to estimate the values of $m$ and $b$ from the graph. However, since we are making a visual estimate, we can also use the graph directly.

Step2: Locate 89 on the y - axis

Find the value of 89 on the vertical axis (number of hot cocoas sold).

Step3: Read the corresponding x - value

Draw a horizontal line from the point on the y - axis corresponding to 89 until it intersects the line of best - fit. Then draw a vertical line down to the x - axis (high temperature). By visual inspection of the graph, when $y = 89$, the corresponding $x$ value is approximately 4 degrees Fahrenheit.

Answer:

4 degrees Fahrenheit