A table titled Angle Measure Conversion with two columns and seven rows. The first column, Degrees, has the entries negative 180, negative 90, 0, 90, 180, 270. The second column, Gradients, has the entries, negative 200, negative 100, 0, 100, 200, 300. Engineers measure angles in gradients, which are smaller than degrees. The table shows the conversion of some angle measures in degrees to angles in gradients. What is the slope of the line representing the conversion of degrees to gradients?
Express your answer as a decimal rounded to the nearest hundredth