hannahellithorpe hannahellithorpe 27-03-2019 Mathematics contestada Help!!! Which equation represents a linear function? Equation 1: y=2^2 +1 Equation 2: y^2 = 3x + 1 Equation 3: y=5x - 1 Equation 4: y= 4x^4 - 1 (Can only be one!!!)