A pair of equations is shown below Y=7x-9. and y=3x-1 part a-in your own words explain how you can solve the pair of equations graphically wireless slope and Y intercept for each equation that you were a part on the graph will solve the Quetion's (6 point) part B what is the solution to the pair of equations ( four points)

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.