A system of equations is given below
y= 1/2 x-3 and y=-1/2 x-3
Which of the following statements best describes the two lines?
They have the same slope but different y intercepte, so they have no solution
They have the same stope but different y intercepts, so they have one solution
They have different slopes but the same y intercept, so they have no solution
They have different slopes but the same y intercept, so they have one solution

NEED HELP

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)