Need help plz

How do you determine if an ordered pair is a solution to a given equation?

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.