1. The table below shows the number of match sticks used to form triangles. use it to draw a line graph. NUMBER OF TRIANGLES:1, 2 ,4 ,5 ,6, 7, 8, 9, 10. NUMBER OF MATCH STICKS:3 ,6 ,9, 12, 15, 18, 21 ,24 ,27 ,30. Use your graph to answer the following questions. A. How many matchstick will be used for the 9th triangle ? B. How many triangles can 18 matchstick make? C. A matchstick box contains 31 matchsticks,how many triangles can you make with these sticks.​