The answers to mathematics exercise 14.1 in Volume 1 of Grade 8

1.0.2 is a constant, X and y are variables. X is an independent variable and Y is a function of X
Y=0.2X
5 is a constant, h and s are variables, h is an independent variable, s is a function of H
S = 5h △ 2, the value range is h ≥ 0
3. Yes
4. The first is any real number, the second X is not equal to 1, and the third x ≥ 1
When x = 5, the first one is 10, the second one is 4 / 3, and the third one is 2
You have to draw this question by yourself. I can make a list for you as follows
X=2 1 0 -1 -2
Y=1 0.5 0 -0.5 -1
You can draw by this one. This one is the simplest
6. Choose 1 ∵ only if x is equal to one value and Y is only one value
seven
The stadium is 2.5km away from Zhang Qiang's home, which takes 15 minutes
21Km
3.20 minutes
4.0.875Km／H

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