Answer:
The average rate of change is 10.
Step-by-step explanation:
Since the average rate of change is the slope of a line, you'd solve this problem by finding the slope.
First, you can start by using the 
method.
Plug in the points (0,10) and (1,20).
Therefore your answer is 10.
Hope this helped!
When a line is perpendicular to another line, the slope is the negative reciprocal of the other line's slope. So in this case, the slope would be 1, since the negative reciprocal of -1 is 1/1 which is 1.
To find the y-intercept, you have to substitute the point (8,2) into y = mx + b
2 = 1(8) + b
b = -6
The equation is y = x - 6
Answer:
This is actually not an identity.
Hi there! I can help you! So the number 17.63 has an x beside it. Looking at the graph, the x-axis represents the number of weeks. So x = number of weeks. 27.52 is the fixed amount, and is the initial amount started out. A, C, and D are all eliminated, because those equations do not fit the line at all. Plus, it doesn't make sense as an answer for this question. The only answer choice that even works is B, because x represents the number of weeks, and 17.63 is besides the variable, which means that $17.63 will be saved each week. The answer is B.
