A function will not have any repeating x values...it can have repeating y values, just not the x ones. In other words, ur x terms have to be all different.
A. .....this is a function
B.......not a function because u have repeating x values
C......this is a function
D......not a function because u have repeating x values
Answer: the slope is 5/4
step by step explanation: -9-6=-15 3- -9=12
15/12= 5/4
Replace x with 10 and simplify the fraction.
40/10 = 4/1 = 4
The answer is 4
