Answer:
1,3,4,5 (2 and four I can't make out what the notations are)
Step-by-step explanation:
Any equation that has a constant slope is a linear equation.
1 has a slope of 8/3
3 has a slope of 5
4 and 5 have a slope of 0
2 looks to be some form of absolute value equation and therefore is in the shape of a V and not a straight line.
6 looks to be an equation with an exponent as part of a term and will have a gradually decreasing slope (decreasing because of the negative 4)
