Which linear graph represents a proportional relationship?
a graph of a line that passes through the points 0 comma 2.5 and 1 comma 4
a graph of a line that passes through the points 0 comma 0 and 4 comma negative 1
a graph of a line that passes through the points 0 comma negative 1 and 1 comma negative 1
a graph of a line that passes through the points 0 comma negative 3 and negative 1 comma negative 2