Question

use the graph below for number 1 and 21) What is the domain and the range of the function above? Use set notation.2) use the function f(x)=3x-5 to evaluate the function when x=3 and x =10

Answer 1

Using the given graph:

Domain is the value of x from the starting to the end

Domain = [0 , 60]

Range is the values of y = [ 0 , 400]

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f(x) = 3x - 5

to evaluate the function at x, substitute with x at the given function

So, when x = 3

f(x) = 3 * 3 - 5 = 9 - 5 = 4

and when x = 10

f(x) = 3 * 10 - 5 = 30 - 5 = 25