Question

how do u know if an equation is linear or not

Answer 1

a linear equation is a equation with the variable/s degree one and no including multiply some variables, for example :
x+2=5 -> linear equation
x^2 + 2x - 3 -> not a linear equation but a quadratic equation
xy + 2x = -3 -> not a linear equation (there is multiply variabel there)

Answer 2

it's in the form of

Answer 3

ok so if the equation is y+3x than it is

Answer 4

yes