This graph compares the cost of an education at different institutions in Texas. A graph titled The Cost of Tuition in Texas from 2012 to 2013 has type of school on the x-axis, and yearly cost in thousands of dollars on the y-axis. Public 4-year university is about 7,000, and private 4-year is 23,000. Public community college is 2,000, and private community college is 9,000. Technical school is 4,000.

This graph demonstrates that

private universities can cost three times as much to attend as public universities.
public universities can cost three times as much to attend as private universities.
community colleges can cost five times as much to attend as technical schools.
technical schools can cost five times as much to attend as community colleges.

The graph is a pictorial representation of the data given.

The graph shows the relationship between two quantities whether it is linear or inversely proportional etc.

The given graph depicts that:

Private universities can cost three times as much to attend as public universities.

The given data tells that

                                a)Public                 b)  Private

University                7000                        23000

College                    2000                        9000

Dividing b by a gives

23000/7000=3.286

9000/200= 4.5

Choice b public universities can cost three times as much to attend as private universities is incorrect.

Choice c community colleges can cost five times as much to attend as technical schools  is also incorrect.

Choice d technical schools can cost five times as much to attend as community colleges is incorrect as well.

The best answer from the given choices is option a: private universities can cost three times as much to attend as public universities.

Reading graph can be understood from the following links.

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private universities can cost three times as much to attend as public universities.

Explanation:

Private universities are more expensive to attend compared to public universities. As per the graph, the public university is cost 7,000 while private university costs 23,000 to attend.  It is then correct to say that private universities cost more than three times as public universities ( 23,000/7,000= 3.29).

Community college costs 9000, while technical schools cost 4000; the cost is not five times more.

Technical schools 4,000 and community colleges are 9000; the costs are only two and a half more.