Which of the following has a graph that is a straight line?

Equation 1: y = 2x + 7
Equation 2: y2 = x − 1
Equation 3: y = 2x2 + 4
Equation 4: y = 3x3

Question

Which of the following has a graph that is a straight line?

 Equation 1: y = 2x + 7
 Equation 2: y2 = x − 1
 Equation 3: y = 2x2 + 4
 Equation 4: y = 3x3

anonymous · Answer

Any of these problems to a degree other than 1 will not have a straight line

anonymous · Answer

oh okay

anonymous · Answer

so the answer would be b

anonymous · Answer

Which of these options has $$x^n$$ Where n=1?

anonymous · Answer

Not quite option two is actually x^(1/2), because of the y^2

anonymous · Answer

oh okay well i literally dont know that much about functions

anonymous · Answer

Its alright. Look at 2x+7, what is the power on the x?

anonymous · Answer

i dont know...