Question: 2. 17 Write a linear equation for the following graph.
a. y = 1/2 x - 3
b. y = -4x - 2
c. y = 4x + 3
d. y = 1/4 x - 4
Graph shape: a straight line with positive slope, crossing the y-axis at about -3 and rising gently to the right
1. **Problem Statement:** We need to find the linear equation that matches a graph described as a straight line with a positive slope, crossing the y-axis at about $-3$, and rising gently to the right.
2. **Recall the slope-intercept form of a linear equation:**
$$y = mx + b$$
where $m$ is the slope and $b$ is the y-intercept.
3. **Analyze the graph description:**
- The line crosses the y-axis at about $-3$, so $b \approx -3$.
- The slope is positive and gentle, meaning $m$ is positive and less than 1.
4. **Check each option:**
- a. $y = \frac{1}{2}x - 3$: slope $m=\frac{1}{2}$ (positive, gentle), y-intercept $b=-3$.
- b. $y = -4x - 2$: slope $m=-4$ (negative, steep), y-intercept $b=-2$.
- c. $y = 4x + 3$: slope $m=4$ (positive, steep), y-intercept $b=3$.
- d. $y = \frac{1}{4}x - 4$: slope $m=\frac{1}{4}$ (positive, gentle), y-intercept $b=-4$.
5. **Compare y-intercepts:** The graph crosses at about $-3$, so $b=-3$ fits best.
6. **Compare slopes:** Both $\frac{1}{2}$ and $\frac{1}{4}$ are positive and gentle slopes, but the graph is described as rising gently, and $\frac{1}{2}$ is a bit steeper than $\frac{1}{4}$.
7. **Conclusion:** The best match is option a:
$$y = \frac{1}{2}x - 3$$
**Final answer:** $y = \frac{1}{2}x - 3$