1). the submarine is descending 100 feet per minute. this is because the line decreases 100 on the y axis when the x axis increases by 1. 2). the submarine is descending 50 feet per minute. this is because the line decreases 50 on the y axis when the x axis increases by 1. 3). y=15x this is because the slope increases by 15 on the y axis when 1 is increased on the x axis. the y intercept is 0. this means that every hour of piano lessons they get paid $15.
Find if all the ratios are proportional to 1:8. 2:16 is, so is 3:24, and 4:32. 4.5*8=36, and 5:40 is proportional. 6:48 is, and 6.5*8=52. The table is proportional, just divide the pay by the hours and you should be getting 8.
