Answer:
Vertical Line test
Step-by-step explanation:
If you can put a vertical line anywhere on the graph, and it doesn't touch more than one point, then it's a function. A function means there are no repeated x values.
Answer:
a
b
d
Step-by-step explanation:
im to lazy but subtract 180 and the others are equal just compare small angles to big ones and should equal 180
They are acute angels cause there smaller than 90
