Which of the following has a graph that is a straight line?
Equation 1: y = 4x^3 + 6
Equation 2: y = 5x − 4.5
Equation 3: y^2 = x − 1
Equation 4: y = 2x^2 + 6

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2

Equation 2 if you would like to know why let me know.

plz tell me why

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