Astronomers have observed that sunspots vary sinusoidally. The variation is from a minimum of about 10 sunspots per
year to a maximum of about 120 per year. A cycle lasts
about 11 years. If a minimum occurred in 1964, which
function could model the number of sunspots, S, as a
function of the year, t?
O
S(t) = -55 cos
21
(t - 1964) + 65
11
O
S(t) = -65 cos
21
-- 1964
11
+ 55
S(t) = -55 cos
21
1 - 1964
11
+ 65
O
S(I) = -65 cos
210
(t - 1964)
11
1964)) +
+ 55

idk i would have to be there to under stand it

step-by-step explanation:

idk i would have to be there to under stand it

none.

step-by-step explanation:

m

1

=

5

m1=5

b

=

−

1

b=-1

find the slope and y-intercept of the second equation.

tap for more

m

2

=

0

m2=0

b

=

−

6

b=-6

compare the slopes

m

m of the two equations.

m

1

=

5

,

m

2

=

0

m1=5,m2=0

compare the two slopes in the decimal form. if the slopes are equal, then the lines are parallel. if the slopes are not equal, then the lines are not parallel.

m

1

=

5

,

m

2

=

0

m1=5,m2=0