RRB Government Jobs Exams

Which of the following equations represent y as a function of x?
a) x^2 + y = 5
b) x^2 - 7x + y^2 = 0
c) x^2 - y^3 - 9 = 0
d) |x| - |y| = 0

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RRB Other Question

Find the constant b so that the three points A(2 , 3), B(4 , 7) and C(8 , b) are
collinear (i.e. on the same line). Which set of ordered pairs represents a function?
a) A = { (a , 3) , (b , 5) , (c , 9) , (d , 9) }
b) B = { (a , -3) , (b , 6) , (c , 1) , (b , 9) }
c) C = { (a , 3) , (b , 3) , (c , 3) , (d , 3) }
d) D = { (a , 5) , (a , -9) , (a , 0) , (a , 12) }