A slope field is observed in which
• All slope segments along the vertical axis x = 0 are horizontal (slope = 0).
• Moving to the right, the slope segments become increasingly positive, while moving to the left they become increasingly negative.
• At a fixed x–value, the slope appears the same for all y–values.
Which differential equation best matches the described slope field?
a) dxdy=xy
b) dxdy=x2
c) dxdy=x
d) dxdy=y