To determine the starting population size, we can analyze the data points provided. The points given are:
- (-5, 50)
- (-1, 100)
- (0, 150)
- (1, 250)
- (2, 450)
- (3, 800)
These points represent the population size (y) at different years (x).
The x-coordinate represents the years where:
- At \(x = -5\), the population was 50.
- At \(x = -1\), the population was 100.
- At \(x = 0\), the population was 150.
To find the starting amount of the invasive species, we look at the data points and notice that the first recorded data point provided (in a more negative year) is at \((-5, 50)\).
Thus, when the data recording began (which appears to be 5 years before year 0), the population was 50.