If the graphs are linear or nonlinear

number 14 is nonlinear

10 Linear

11 Nonlinear

12 Nonlinear

13 Nonlinear

14 Nonlinear

15 Linear

Step-by-step explanation:

If the gradient is a constant, the graph is linear.

10) y = 2x - 1

15) y = 3x + 2

Whereas

12) 2x^2

The graph is not linear because x^2 is not a constant.

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!