Which of the following has a graph that is a straight line? (4 points)

Question 1 options:

1)

Equation 1: y = 4x3 + 6

2)

Equation 2: y = 5x − 4.5

3)

Equation 3: y2 = x − 1

4)

Equation 4: y = 2x2 + 6