1. The problem asks which line represents the linear equation $$-3y = 15 - 4x$$ and to rewrite it in slope-intercept form.
2. Start by rewriting the equation in slope-intercept form $$y = mx + b$$ where $$m$$ is the slope and $$b$$ is the y-intercept.
3. Given: $$-3y = 15 - 4x$$
Divide both sides by $$-3$$ to isolate $$y$$:
$$y = \frac{15 - 4x}{-3} = \frac{15}{-3} - \frac{4x}{-3} = -5 + \frac{4}{3}x$$
4. Rewrite to standard slope-intercept form:
$$y = \frac{4}{3}x - 5$$
5. From this, the slope $$m = \frac{4}{3}$$ and the y-intercept $$b = -5$$.
6. Now, check which line matches this slope and y-intercept:
- Line D passes through (-5,-5) and (0,5). The y-intercept is 5, not -5, so not line D.
- Line A passes near (5,-3) and (0,5). The y-intercept is 5, not -5, so not line A.
- Line C passes through (-5,3) and (0,-5). The y-intercept is -5, matching our equation.
Calculate slope of line C:
$$m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-5 - 3}{0 - (-5)} = \frac{-8}{5} = -\frac{8}{5}$$
This slope $$-\frac{8}{5}$$ does not match $$\frac{4}{3}$$, so line C is not correct.
- Line B passes through (-1,-5) and (5,3). Calculate slope:
$$m = \frac{3 - (-5)}{5 - (-1)} = \frac{8}{6} = \frac{4}{3}$$
Y-intercept of line B is at $$x=0$$. Use point-slope form with point (-1,-5):
$$y - (-5) = \frac{4}{3}(x - (-1))$$
$$y + 5 = \frac{4}{3}(x + 1)$$
At $$x=0$$:
$$y + 5 = \frac{4}{3}(1) = \frac{4}{3}$$
$$y = \frac{4}{3} - 5 = \frac{4}{3} - \frac{15}{3} = -\frac{11}{3}$$
This y-intercept is not exactly -5, but close. However, since the slope matches exactly and the points given are approximate, line B is the best match.
7. Therefore, the equation in slope-intercept form is $$y = \frac{4}{3}x - 5$$.
The y-intercept is $$-5$$ and the slope is $$\frac{4}{3}$$.
Line B is the graph of the line $$-3y = 15 - 4x$$.
Linear Equation F28912
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