Help please I don’t know please

Answer:
[tex]-\frac{3}{10}[/tex]
Step-by-step explanation:
Slope is the change in y coordinates by change in x coordinates.
Or [tex]m=\frac{\delta y}{\delta x}[/tex]
Looking at the table, the change in each value of x is 10 (10 to 20 to 30 to 40).
Also, the change in each valueof y is -3 (20 to 17 to 14 to 11).
Note: change in y is negative since it is DECREASING.
Hence the slope would be -3/10