# What is the slope and y intercept of y=3.75?

This function (linear) representes a constant which is fixed at the value of 3.75; graphically it representes a straight line passing through the point of coordinates (0 ; 3.75) on the y axis and parallel to the x axis.
$y = a x + b$
where the real number $a$ representes the slope and the other real number $b$ represent the intercept on the y axis, for your function we have:
$y = 0 x + 3.75$