1. **Problem Statement:** We are given a table of time $t$ (in hours) and distance $d$ (in kilometers) for Paul's drive from Vancouver to Kelowna. We need to graph the linear relation and find how far Paul drove in the first 2 hours.
2. **Understanding the Data:** The table shows pairs $(t, d)$:
$$
\begin{array}{c|c}
\text{Time } t (h) & \text{Distance } d (km) \\
\hline
0.5 & 45 \\
0.9 & 81 \\
1.2 & 108 \\
1.5 & 135 \\
2.3 & 207 \\
2.7 & 243 \\
3.5 & 315
\end{array}
$$
3. **Step 1: Graph the linear relation.**
- The horizontal axis (x-axis) is time $t$ in hours.
- The vertical axis (y-axis) is distance $d$ in kilometers.
- Plot each point $(t, d)$ from the table.
- Connect the points with a straight line since the relation is linear.
4. **Step 2: Find the linear equation.**
- Use two points to find the slope $m$:
$$
m = \frac{d_2 - d_1}{t_2 - t_1} = \frac{81 - 45}{0.9 - 0.5} = \frac{36}{0.4} = 90
$$
- The slope $m=90$ means Paul drives 90 km per hour.
- Use point-slope form with point $(0.5, 45)$:
$$
d - 45 = 90(t - 0.5)
$$
- Simplify:
$$
d = 90t - 45 + 45 = 90t
$$
So the linear equation is:
$$
d = 90t
$$
5. **Step 3: Calculate distance driven in first 2 hours.**
- Substitute $t=2$ into the equation:
$$
d = 90 \times 2 = 180
$$
**Answer:** Paul drove 180 kilometers in the first 2 hours.
Linear Distance C4570B
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