1. **Problem Statement:** We are given two sets of data representing the relationship between the number of hours worked and the amount charged by two lawn care services: Susan's Lawn Care (table) and Jim's Lawn Care (graph).
2. **Goal:** Understand the linear relationship between hours worked and amount charged for both services.
3. **Formula for Linear Relationship:** The amount charged $y$ is related to hours worked $x$ by a linear equation:
$$y = mx + b$$
where $m$ is the rate (slope) and $b$ is the fixed charge (y-intercept).
4. **Susan's Lawn Care Analysis:**
- From the table, pick two points: $(2,48)$ and $(3,72)$.
- Calculate slope $m$:
$$m = \frac{72 - 48}{3 - 2} = \frac{24}{1} = 24$$
- Check if $b=0$ by substituting $x=2$:
$$48 = 24 \times 2 + b \Rightarrow b = 48 - 48 = 0$$
- Equation for Susan's Lawn Care:
$$y = 24x$$
5. **Jim's Lawn Care Analysis:**
- Given points: $(1,20)$ and $(6,140)$.
- Calculate slope $m$:
$$m = \frac{140 - 20}{6 - 1} = \frac{120}{5} = 24$$
- Find $b$ using point $(1,20)$:
$$20 = 24 \times 1 + b \Rightarrow b = 20 - 24 = -4$$
- Equation for Jim's Lawn Care:
$$y = 24x - 4$$
6. **Interpretation:** Both services charge at a rate of 24 dollars per hour. Susan's Lawn Care has no fixed fee, while Jim's Lawn Care has a fixed fee of -4 dollars (which may indicate a discount or adjustment).
**Final answers:**
- Susan's Lawn Care: $$y = 24x$$
- Jim's Lawn Care: $$y = 24x - 4$$
Lawn Care Rates
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