Which of the following is the graph of a linear function?

A) A coordinate grid is shown with a slanting straight line segment that starts at a point in the second quadrant, cuts the negative x-axis and negative y-axis, and ends at the fourth quadrant.
B) A coordinate grid is shown with a u-shaped graph which cuts the axis at 2 points and the negative y-axis at 1 point.
C) A coordinate grid is shown with two slanting straight line segments that meet at a point in the first quadrant.
D) A coordinate grid is shown with a curved line that cuts the positive axis at 1 point and the y-axis at 2 points.