Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
2. Graphs of Equations
Lines
2:38 minutes
Problem 67
Textbook Question
Textbook QuestionFor each line described, write an equation in(a)slope-intercept form, if possible, and(b)standard form. through (-7, 4), perpendicular to y=8
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Slope-Intercept Form
The slope-intercept form of a linear equation is expressed as y = mx + b, where m represents the slope of the line and b is the y-intercept. This form is useful for quickly identifying the slope and y-intercept, making it easier to graph the line. To convert an equation into this form, one typically isolates y on one side of the equation.
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Slope-Intercept Form
Standard Form
The standard form of a linear equation is given by Ax + By = C, where A, B, and C are integers, and A should be non-negative. This form is particularly useful for analyzing the relationship between x and y and for solving systems of equations. To convert from slope-intercept form to standard form, one rearranges the equation to fit this structure.
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Standard Form of Polynomials
Perpendicular Lines
Two lines are perpendicular if the product of their slopes is -1. This means that if one line has a slope of m, the slope of the line perpendicular to it will be -1/m. In the context of the given question, since the line y = 8 is horizontal (slope = 0), the perpendicular line will be vertical, which cannot be expressed in slope-intercept form but can be represented in standard form.
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Parallel & Perpendicular Lines
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