Which equation represents a linear function?
Equation 1: y = 2x2 + 1
Equation 2: y2 = 8x + 1
Equation 3: y = 5x3 – 1
Equation 4: y = 7x – 1
Equation 1 Equation 2 Equation 3 Equation 4

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the numbers after the variables are exponents

linear functions don't have exponents. Which is that?

equation 4

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