Question

Which of the following gives an example of a function that is not linear?(1 point)
Responses

y=x2−3x+2.25
y equals x squared minus 3 x plus 2.25

y=16x+23
y equals Start Fraction 1 over 6 End Fraction x plus Start Fraction 2 over 3 End Fraction

9x+3y−18=0
9 x plus 3 y minus 18 equals 0

2x+3y=16
2 x plus 3 y equals 16

Answer 1

y = x^2 − 3x + 2.25

Reason: it has an x^2 term (quadratic). Linear functions are of the form y = mx + b (no x^2 or other nonlinear terms).