Answer:
161 cm
Step-by-step explanation:
Since 115 cm is 5 boxes, we take 115 and divide it by 5. This will get us the cm of 1 box. 115/5=23
Now we take 23 and multiply it by 7 to get the final height. 23x7=161
#3 is not a function because there are two answers for one out put
#4 is a function because it is a straight line
The solution for the #23 equation is either x=9 or x= -3
