The graph below shows a company's profit f(x), in dollars, depending on the price of
erasers x, in dollars, being sold by the company
300 + f(x)
270
240
210
180
150
120
n
90 +
60
30 H
-
2 3
5 6 7
9 10
-30
Part A: What do the x-intercepts and maximum value of the graph represent? What are
the intervals where the function is increasing and decreasing, and what do they represent
about the sale and profit? (6 points)
Part B: What is an approximate average rate of change of the graph from x = 1 to x = 4,
and what does this rate represent? (4 points)
(10 points)

1. C

2. D

Step-by-step explanation:

1. first find the slope by using the formula (y2-y1)/(x2-x1). We need to find the equation for CE so use points C (0, 1) and E (5, 5). (5-1)/(5-0) = 4/5, which is the slope. from there u can tell that the answer is the third choice, which let's say is C, because the y intercept of the line is 1.

2. Do the same thing except with points A (-5, 1) and D (0, 6). (6-1)/(0-(-5)) = 1

The y intercept is 6 because that is where the line intersects the y axis, or where x is 0.

so the equation is y=x+6, which is just the last option, let's say D, but just rearranged