trig graphs

[dcgirl]

i need help determining is a graph is a cos graph or a sin graph
the graph has 24 numbers on the x axis reaching a minimum at 4 and 16 and maximum at 10 and 23

 

[stapel]

Since the cosine is just the sine shifted over by pi/2, they are interchangeable.

Please provide the full text of and instructions for this exercise, including a detailed description of any associated graphic.

Thank you.

Eliz.

 

[dcgirl]

i mean that the y axis is reaching a min and max at those points

 

[stapel]

i mean that the y axis is reaching a min and max at those points

The y-axis is a vertical line. What do you mean by "the y axis is reaching a min and a max at those points"? Which points? And why does the axis have max/min points, instead of the graph?

Please provide the full text of and instructions for this exercise, including a detailed description of any associated graphic.

Thank you.

Eliz.

 

[dcgirl]

Time Height
1 4.1
2 2.4
3 1.2
4 0.7
5 1.2
6 2.4
7 4.1
8 5.8
9 7.1
10 7.6
11 7.2
12 6.1
13 4.5
14 2.9
15 1.6
16 0.8
17 1.1
18 2.1
19 3.7
20 5.4
21 6.1
22 7.2
23 7.6
24 7.1

these are the point that i have to make a graph and then i have to create an equation that approximates the date so i need to find if this is a cos graph or a sin graph i have my period, amplitute and the vertical shift but i cant find the phase shift until i know what kind of graph it is

 

[dcgirl]

sorry the graph reaches min andmax at those points

 

[stapel]

i have my period, amplitute and the vertical shift but i cant find the phase shift until i know what kind of graph it is

That's the point of what I said in my first reply: the graphs of sine and cosine are the same, other than a pi/2 (that is, a 90°) phase shift. So you pick which sort of graph it will be, and then work from there.

Eliz.