Which statements correctly describe the graph of the function f(x) = x3 – 2x2 - 19x + 20? Select three options. As the x-values increase, the y-values always increase.
As x approaches negative infinity, y approaches negative infinity.
O The domain of the function is all real numbers.
The range of the function is y > 20.
The graph has a positive y-intercept.

See below for answers and explanations (along with a graph for reference)

Step-by-step explanation:

A is true because the end behavior shows that as x gets larger, y also gets larger

B isn't true because that is an incorrect interpretation of the end behavior while the statement itself is true.

Any real value of x can be defined on the graph with an output, therefore C is also correct.

D is not true because that would contradict option C which we said was right since the domain and range are both all real numbers.

E is true because the y-intercept of the graph is (0,20) which is positive (marked in purple)

70,000 + 6,000 + 800 + 30

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional