Answer:

Step-by-step explanation:
The slope of a line is the change in the line. It can be found using the formula;
or
.
Substitute in the given points, and solve for the slope;

This problem is very simple. All you have to do is add 10 and 9. The correct answer is D.
Given:
Karen earns $54.60 for working 6 hours.
Amount she earns varies directly with the number of hours she works.
She need to work to earn an additional $260.
To find:
Number of hours she need to work to earn an additional $260.
Solution:
Let the amount of earnings be A and number of hours be t.
According to question,

...(i)
where, k is constant of proportionality.
Karen earns $54.60 for working 6 hours.

Divide both sides by 6.


Put k=9.1 in (i).

Substitute A=260 in the above equation.

Divide both sides by 9.1.



Therefore, she need to work extra about 29 hours to earn an additional $260.
The last choice would be the answer