Please help, brainliest will be award to actual answers, try explaining

A.  

Step-by-step explanation:

A positive rate of change is when it goes from one interval to another, and the y-variables are going up, or the change is positive. On this graph, it is when y goes up from one variable to another. For a, it says when x=0 to x=1. You look at the y-variables for that interval, and you see that it is positive because it is going from 50 to 75 and it is going up. F is x=2 to x=3. The y-variables are 40 and 65. This time, it is also going up. These are the only times where the y-variables are going up, or the rate of change is positive.  

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1