I need help!
Which of the following has a graph that is a straight line?
a. y^2 = x - 1
b. y = 2x^2 + 4
c. y = 2x + 7
d. y = 3x^3
![I need help Which of the following has a graph that is a straight line a y2 x 1 b y 2x2 4 c y 2x 7 d y 3x3 class=](https://us-static.z-dn.net/files/d56/c4759d0d5dd7161c5b3f9e6596e0b9c3.png)