Respuesta :
Answer:
3x + 5y = 9
Explanation:
A linear function is represented by the equation: y = mx + b
In option C:
3x + 5y = 9 is a linear equation as it has slope and y-intercept

Linear means degree is 1
#A
- xy=12
Not linear
#B
- y=x⁵-x⁴
Degree is 5 not linear
#C
- 3x+5y=9
Linear
#D
- y-2=x²+x
Degree is 2 hence quadratic