1. **State the problem:** We need to find the linear equation in slope-intercept form $y = mx + b$ that fits the given table of points: $(4, 28)$, $(5, 29)$, $(6, 30)$, and $(7, 31)$.
2. **Recall the formula:** The slope-intercept form is $y = mx + b$, where $m$ is the slope and $b$ is the y-intercept.
3. **Calculate the slope $m$:** The slope is the change in $y$ divided by the change in $x$ between any two points.
$$m = \frac{y_2 - y_1}{x_2 - x_1}$$
Using points $(4, 28)$ and $(5, 29)$:
$$m = \frac{29 - 28}{5 - 4} = \frac{1}{1} = 1$$
4. **Find the y-intercept $b$:** Use the slope and one point to solve for $b$.
Using point $(4, 28)$:
$$28 = 1 \times 4 + b$$
$$b = 28 - 4 = 24$$
5. **Write the equation:** Substitute $m = 1$ and $b = 24$ into the slope-intercept form.
$$y = 1x + 24$$
or simply
$$y = x + 24$$
This equation matches all points in the table, confirming it is correct.
Linear Equation B4Af54
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