If you were to plan a party, you could use a linear equation. for example, the room you are renting is $500. The price for food per person is $10
For the first one it is the fourth one 15/x
The answer to your math problem is C. The reason being is 2x times x is 2x^2 and 2x times 11 is 22x. So you first part of the problem looks like 2x^2+22. Then -6 times x is -6x and -6 times 11 is -66. So now the problem is 2x^2+22x-6x-66. So your answer after solving it is 2x^2+16x-66.
6
9x is rate of function
3x is rate of function
y=mx+b
