If I'm understanding this correctly you mean:
If a vertical line does not connect to more than one point in a relation then that relation is a function.
Then your answer is A-True.
That is called the vertical line test. The vertical line cannot touch more than one point at the same time if it is a function. If it does touch then it is not a function.
x-7> -9
x> -2 (add seven to nine)
THat would be B
Addition Property of EQuality
Multiply each side of your equation by 24.
Then one side of it will be 'x',and the other side will be the value of 'x'.
(It will be in the form of a fraction, which you may want to simplify.)
Mrs. Walters: 14.4 miles per gallon
Mr. Walters: 15 miles per gallon
Mr. Walters is getting the better mileage per gallon.
