Answer:Based on the given equation x - 4y = -48.8, which models the US population who lives in urban areas, y, in tens of millions for the years since 1960, we can draw the following conclusions:
1. The coefficient of y (-4) indicates that for every increase of 1 in y (representing each additional ten million people living in urban areas), x decreases by 4. This suggests an inverse relationship between x and y.
2. The negative sign in front of 48.8 (-48.8) indicates that x is negative, which means that the value of x decreases as the years since 1960 increase.
3. The equation provides information about the urban population in the US over time, indicating that the researcher used this equation to analyze and predict changes in the urban population based on the years since 1960.
It is important to note that without further information, we cannot determine specific values for x or y or make precise predictions about the US urban population. However, these statements are true based on the given equation and its interpretation.
Explanation: