Which point is on the graph of f(x) = 4x

There are an infinite number of points on that graph.

Step-by-step explanation:

To find any of them, simply input a value for x and simplify to find y.

For this example, we'll use x = 4

f(x) = 4x

f(x) = 4(4)

f(x) = 16

So we could find (4, 16) on the graph

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40