find the slope and the y intercept

Question

y=3.1x-9
the slope is
the y intercept is
help thank you

Answer 1

For a line in the form y = mx + b, the slope is m and the y intercept is b.

Answer 2

but it says the y intecept is (0,
something

Answer 3

The y intercept is the point (0, b), which is often said to be b because the x value of the y axis is 0.