-Is this a sine function or cosine? How do you know?
-Whats the amplitude?
-What’s the time period ? What’s the value of B?
-What’s the equation of the midline?
-Determine an equation for this graph

a) Cosine function

b) amplitude=1

c) Period=π, b=2

d) y=0

e)

Step-by-step explanation:

a)Since the graph is symmetric with respect to the y-axis, it is a cosine function. This time the cosine function is reflected in the x-axis.

b) The graph ranges between -1 and 1, therefore we have the amplitude to be |-1|=|1|=1

c) The graph completes one full cycle within every π units. Therefore the time period is π. Also the value of b is 2, because the graph repeats twice on the interval [0,2π]

d) The midline divides the graph into two equal halves.

The midline has equation y=0.

e) The equation of this graph is of the for m,

where a=1 is the amplitude and b=2 is the frequency.

Therefore the equation is :

18.75 gallons

step-by-step explanation:

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )