We have to find the slope and the y-intercept of the linear function shown.
For doing so, we will take two points that pass through the line and we will use the formula:

for finding the slope. In this case, two of those points could be:

Using them, and replacing onto the slope formula we get:

This is, the slope is - 3/4.
For the y-intercept, we see that the function passes through the point:

and then, when x=0, y=3. This means that the y-intercept is 3.