Big Ideas Math Integrated I, 2016
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Big Ideas Math Integrated I, 2016 View details
5. Graphing Linear Equations in Slope-Intercept Form
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Exercise 23 Page 142

Error: Misinterpretation of slope-intercept form
Slope: - 1/4
y-intercept: (0,0)

Practice makes perfect
We notice that this equation is solved for x and not y. This means it is not in slope-intercept form. Let's isolate y and then we can identify the slope and y-intercept of the graph.
x=-4y
- x=4y
- 1/4 x =y
y=- 1/4 x
Now, we can see that the slope of the line is - 14. Also since there is no constant, we can tell that the function intercepts the y-axis at the origin when y=0.