The percentages associated with each method on the pie-chart is as follows:
Walk: 50%.
Cycle: 8.3%.
Car: 25%.
Bus: 16.7%.
<h3>What is a pie chart?</h3>
A <em>pie-chart</em> is a circular graph in which each region corresponds to a data, and the percentages of each data on the graph are associated to the percentages of the data.
In this problem, the regions are: Walk, Cycle, Car, Bus
30 out of 60 students walk, hence the percentage associated with Walk is:
5 out of 60 students cycle, hence the percentage associated with Cycle is:
15 out of 60 students go by car, hence the percentage associated with Car is:
10 out of 60 students go by bus, hence the percentage associated with Bus is:
This is because, the intercept is the expected mean value of Y when x is equal zero. If x is never zero; that is, no data value is near x equal zero, the regression has little meaning. There is no interest in the regression.