Which of the following describes the graph of a linear function?

it is a curve that lies in only two quadrants.
its y-values decrease at a constant rate as its x-value increases.
it is a straight line in one portion and a curve in another portion.
its y-values increase at a nonconstant rate as its x-value increases.

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

17

step-by-step explanation: