graph the function y=-3 cos 2x.
to draw the graph, plot all points corresponding to x-intercepts, minima, and maxima within one cycle. then click on the graph icon.

  see the attachment for a graph

Step-by-step explanation:

You know the cos(θ) function has a maximum of 1 at θ=0 and 2π, and a minimum of -1 at θ=π. You know it has zeros at θ=π/2 and 3π/2. Here, θ=2x, so all of these θ-values will be cut in half to turn them into values for x.

Here, too, the function is multiplied by -3, so the maximum cos(2π)=1 becomes the minimum on your graph, -3cos(2x)=-3 where x=0 or π.

what the question so we can you out

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.