Question

picture below of question

Answer 1

The y-intercept of a function is the value of the function when x = 0, where the graph would cross the y-axis.
Plug in 0 for x for both functions, you'll see.

Answer 2

could you show me... i dont know hw to subtract 5 from 5cos... would it be cos

Answer 3

5*cos(3x) - 5; We're plugging in 0 for x. Also, remember order of operations.
5*cos(3*0) - 5
5*cos(0) - 5 ---> The cosine of 0 is 1.
5*1 - 5 = 5-5 = 0

Answer 4

ohhhh ok and what about the other one?

Answer 5

Well, it is a table of values. When x = 0, y = 0. 0 is the y-intercept for f(x).

Answer 6

oh wow so both have the same... thank you!