Question

julia has a part - time job at an ice skating rink selling hot cocoa. she decided to plot the number of hot cocoas she sold relative to the days high temperature and then draw the line of best fit. what does the point $(21,65)$ represent?
answer
when the days high temperature was $65^{circ}$ f, julia sold 21 hot cocoas.
when the days high temperature was $21^{circ}$ f, julia sold 65 hot cocoas.
when the days high temperature is $65^{circ}$ f, julia should expect to sell about 21 hot cocoas.
when the days high temperature is $21^{circ}$ f, julia should expect to sell about 65 hot cocoas.

Explanation:

Step1: Understand the coordinate system

In a coordinate system \((x,y)\), \(x\) - axis represents the independent variable and \(y\) - axis represents the dependent variable. Here, the \(x\) - axis is labeled as "High Temperature (Degrees Fahrenheit)" and the \(y\) - axis is labeled as "Hot Cocoa Sold".

Step2: Analyze the point \((21,65)\)

For the point \((x = 21,y=65)\), since \(x\) is the high - temperature and \(y\) is the number of hot - cocoas sold. The \(x\) value \(21\) corresponds to the high temperature and the \(y\) value \(65\) corresponds to the number of hot - cocoas sold.

Answer:

When the day's high temperature was \(21^{\circ}\text{F}\), Julia sold \(65\) hot cocoas.