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

linear means first degree

first degree means the hightest exponent of the variables is 1

so

equation 1:

$y=2x^2+1$

highest exponent is 2, not 1

not leinear

equation 2: y^2=3x+1

highest exponent is 2, not 1

not linear

equaton 3 y=5x-1

y=5x^1-1, it is 1

it is linear

equaton 4

y=4x^4-1

highest is 4, not 1

not linear

answer is equation 3: y=5x-1