Question

1. the scatter diagram shows the number of sales of hot-chocolate a cafe makes as a function of temperature. 3a which type of model would be appropriate for this data? linear quadratic

Explanation:

Step1: Analyze the scatter plot trend

The points in the scatter diagram show a consistent downward trend as temperature (x - axis) increases, with a roughly constant rate of decrease in hot - chocolate sales (y - axis).

Step2: Compare linear and quadratic models

A linear model is appropriate when the data shows a constant rate of change (a straight - line trend), while a quadratic model shows a curved (parabolic) trend (either a U - shape or an inverted U - shape). Since the points here follow a straight - line - like decreasing pattern, a linear model is suitable.

Answer:

Linear