To create a graph of human population growth, we need to visualize the given data properly. Here's a step-by-step guide to complete this task:
### Step 1: Understand and Correct the Data
From the table, we noticed there are some formatting issues which we will correct for accuracy:
- In the year 1750, the value should be `0.7` instead of `70`.
- In the year 1925, the value should be `2.0` instead of `[tex]$2: 0$[/tex]`.
Here is the corrected table:
[tex]\[
\begin{array}{|l|l|}
\hline \text{Year} & \text{Number of People (in billions)} \\
\hline 1650 & 0.5 \\
\hline 1750 & 0.7 \\
\hline 1850 & 1.0 \\
\hline 1925 & 2.0 \\
\hline 1956 & 2.5 \\
\hline 1966 & 3.3 \\
\hline 1970 & 3.6 \\
\hline 1976 & 4.0 \\
\hline 1980 & 4.4 \\
\hline 1991 & 5.5 \\
\hline 2000 & 6.0 \\
\hline 2004 & 6.4 \\
\hline 2012 & 7.1 \\
\hline 2016 & 7.6 \\
\hline 2020 & 7.8 \\
\hline
\end{array}
\][/tex]
### Step 2: Define the Axes and Scale
- Horizontal Axis (X-Axis): This will represent the year, ranging from 1650 to 2050.
- Vertical Axis (Y-Axis): This will represent the number of people in billions, ranging from 0 to 15 billion.
### Step 3: Plot the Data Points
Using the corrected table data:
- Plot points such as (1650, 0.5), (1750, 0.7), (1850, 1.0), and so on.
### Step 4: Draw the Graph
To draw the graph, follow these steps:
1. Draw the Axes:
- Draw a horizontal line (X-axis) and mark it from 1650 to 2050.
- Draw a vertical line (Y-axis) and mark it from 0 to 15 billion.
2. Label the Axes:
- Label the X-axis as "Year".
- Label the Y-axis as "Number of People (in billions)".
3. Plot Points:
- Carefully plot each data point on the graph based on the table values.
4. Connect the Points:
- Connect the points with a smooth line to show the trend of human population growth over time.
5. Title the Graph:
- Title the graph as "Human Population Growth Over Time".
### Step 5: Predict Future Growth
To predict future growth:
- Observe the overall trend in the graph. The human population shows a rapid increase, especially after the industrial revolution.
- Extrapolate the trend line beyond the last given year (2020) up to the year 2050 to predict future values.
### Step 6: Identify Factors Affecting Population Growth
Several factors can affect population growth:
- Medical Advances: Improvements in healthcare have increased the average lifespan, thus contributing to population growth.
- Agriculture: Better agricultural techniques and innovations have increased food production, supporting larger populations.
- Economic Factors: Industrialization and economic growth can increase population by providing more job opportunities and better living standards.
- Social and Cultural Factors: Changes in birth rates due to social and cultural practices can also affect population growth.
- Government Policies: Policies regarding family planning and immigration can impact population numbers.
By plotting the graph and analyzing it, you can gain insights into how the human population has changed over time and predict future trends based on historical data.
