Problem 7 of 35alg-007
In the standard coordinate plane, which equation describes the line through and ?
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The walkthrough opens once you check an answer.
Solution walkthrough1:55
- Every choice has the form : is the slope and is where the line crosses the -axis.
- Slope is rise over run. Run: . Rise: . So .
- Put the point into : , so .
- The line is . Check with the other point: .
- Traps: a slope of loses the sign, is run over rise, and is copied from a point.