Enter values for a ratio and explore how slope is related to the x- and y-axis scales for proportional relationships. Enter a ratio, such as 4 miles to 2 hours, and clink on the tools above the app to change the axes scales, zoom in, and zoom out on the graph. Contact us at ptierneyfife@edc.org if this resource should be updated, or with questions or suggestions. We appreciate your help maintaining the quality of this resource.