Answer:
Step-by-step explanation:
For a function to have a y-intercept of -1, means that
when x = 0, f(0) = -1.
we must look for which of the options meets this condition.
I will number the options as follows:
when x = 0:
Note: , so
function 1 meets the condition for the y-intercept.
when x = 0
function 2 also meets the condition for the y-intercept.
when x = 0
Note:
function 3 also meets the condition for the y-intercept.
when x = 0
function 4 does not meet the condition for the y-intercept, so we discard it.
We are left with the 3 first functions as options. Now we consiser that the amplited must be 2.
The amplitude in an oscillatory function like these is the number that accompanies the sine or the cosine:
f(x) = ±Asin(x) or
f(x) = ±Acos(x)
so out of the option we have to consider, only the second function has a number 2 next to the sine function:
this function will have a y-intercept of -1 and an amplitude of 2 (because the sine has a number 2 next to it)
Answer:
Step-by-step explanation:
No, because Bernie had to run 9 meters 7.77777778 time (70/9) and each of those 9-meter sections took 4 seconds, so her time was 31.1111111 (7.77777778*4). While Wendel had to run 61 meters 70-his headstart (9 meters) (70-9). So he only had to run 30.5 blocks of 2 meters (61/2). And since they're only 1 second long, it's 30.5*1=30.5.
So the answer is a NO because (Bernie) 31.1111111 seconds > 30.5 seconds (Wendel).
Answer:
60 mph?
Step-by-step explanation:
If she drives 320 miles in 5 hours, her average speed would be 64 mph, but 60 is the closest so I would go with that I guess. I'm pretty sure these are all wrong options though
Answer:
I think it’s C
Step-by-step explanation:
I think