Question

Which equation represents a linear function?

Equation 1: y = 2x2 + 1

Equation 2: y2 = 3x + 1

Equation 3: y = 5x – 1

Equation 4: y = 4x4 – 1 (5 points)


Equation 1
Equation 2
Equation 3
Equation 4

Answer 1

The answer is: [C]: "Equation 3" .
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{which is: " y = 5x – 1 " } .
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Note: Among the FOUR (4) equations in the answer choices; "Equation 3" is the only equation that does NOT contain an "exponent" (that is; an exponent other than the (implied exponent of "postive 1").
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Furthermore, "Equation 3" is written in "slope-intercept form" ; that is:

"y = mx + b" ; the form of a linear equation.
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