The histogram shows the number of cell phone calls received by Medera, a middle school student, one Saturday from 10
a. m. to 10 p. m.
Cell Phone Calls
12
10
8
Numberof calls
6
4
2
0
10 a. m.-
11:59 am
12 p. m. -
1:59 pm
2 p. m. - 4 p. m. -
3:59 pm 5:59 p. m.
Time of Day
6 p. m. -
7:59 p. m.
8 p. m. -
9:59 pm

The answer is: y would equal 3 because if you simplify the equation then it would be y= 3x+9 and if you divide 3x and 9 by 3 it would equal 3. y= 3

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.