Q. Which describes the system of equations below?y=−710x−9y=109x+72Choices:(A)consistent and dependent(B)consistent and independent(C)inconsistent
Analyze slopes: Analyze the slopes of both equations.The first equation is y=7−10x−9, which has a slope of 7−10.The second equation is y=109x+72, which has a slope of 109.Since the slopes are different, the lines are not parallel and they will intersect at some point.
Determine single solution: Determine if the system has a single solution.Since the slopes are different, the lines will intersect at exactly one point. This means the system has a single solution and is therefore consistent.
Dependent or independent: Determine if the system is dependent or independent. A system is dependent if the equations represent the same line; however, in this case, the lines are not the same because they have different slopes and different y-intercepts. Therefore, the system is independent.
Choose system description: Choose the correct description of the system.The system of equations is consistent because there is at least one solution, and it is independent because there is exactly one solution. The correct choice is (B) consistent and independent.