Which functions have a positive rate of change and which have a negative rate of change?
Column A Column B
1. 2x – 3y = 9 A. positive
B. negative
2. y = −4x + 5
3. x y
−1 −5
1 1
3 7
4. x y
1 −2
2 −6
3 −10
Ok I just did a test on this and my teacher taught me how to do it, For problem like number 3 with the table of numbers, You take the first to sets like -1,-5 and 1,1....Then you do 1 - (-5) = your answer then 1 - (-1) = your answer than you get 6 and 2 ...you want to divided those numbers 6/2 = 3 and that is positive so #3 is positive. Same thing for #4 1,-2 and 2,-6 -6 - (-2) = x 2 - 1 = x x/x I want you to solve #4 for yourself #2 is already done y = -4x + 5 just take the -4 and -4 is negative so #2 is negative. Then #1 I have a hard time with those but I think it's positive
