Is { (8,5) , (7,5) , (6,2) , (8,3) , (1,-4), (-4,6)} a function? why?

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

Common binomial factor of 6x(3x+7)+5(3x+7)