3 erasers cost $4.41. Which equation would help determine the cost of 4 erasers?
( use the picture above for the answer choices i have )

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2