In the equation y=-2x +5, how do you name the slope and the y intercept?

Slope $= - 2 ,$ and, Y-intercept $= 5.$
When an eqn. of a line is written as $: y = m x + c$, $m$ is the slope and $c$ is the Y-intercept of the line.
In our case, Slope $= - 2 ,$ and, Y-intercept $= 5.$