Which is a linear equation?
a. y = -5/x
b. y = 2 - 5x2
c. y = 2 - 5x
d. y = -5x2
i think it's c. y = 2 - 5x
C.
For A, y = -5/x, the x is in the denominator of the fraction. so it's not a linear equation.
For B, y = 2 - 5x2, that's obviously a quadratic equation.
For D, y = -5x2, that's obviously a quadratic equation.