James collects the lengths of some animals and records the data in the table below.
Length (x cm) Frequency
15 < x < 20 1
20 < x < 25 5
25 < x < 30 3
Find the mean of the data in the table.
Give your answer correct to 1 decimal place where appropriate.​

Given the following linear function sketch the graph of the function and find the domain and range. ƒ(x) = -5x + 4

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?

Describe how to determine the average rate of change between x = 4 and x = 6 for the function f(x) = 2x^3 + 4. include the average rate of change in your answer.