Question

19:09
ide
as a function of the number of months x, since november 2014, where 0 ≤ x ≤ 30. the
graph of y = s(x) is shown.
which of the following is the best estimate for the monthly mean number of sunspots in
november 2015?
a 35
b 45
c 55

Explanation:

Step1: Calculate the number of months from November 2014 to November 2015

November 2014 to November 2015 is 12 months. So \(x = 12\).

Step2: Locate \(x = 12\) on the graph

On the \(x\) - axis (months since November 2014), find \(x = 12\). Then, look at the corresponding \(y\) - value (monthly mean number of sunspots).

Step3: Estimate the \(y\) - value

When \(x = 12\), by observing the graph, the \(y\) - value (monthly mean number of sunspots) is closest to 45.

Answer:

B. 45