Help me pleaseee , i did not learn this and i do not underu

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

The customer price index(cpi), which measures the cost of a typical package of customer goods, was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely. use data points to find such a line and then estimate the requested quantities

Need so much on this one how many yards?