What’s the y-intercept of the graph

-3

explanation:

since the line crosses the y-axis on the point -3

c = - 3

Step-by-step explanation:

The y- intercept is the point on the y- axis where the line crosses.

The line crosses the y- axis at (0, - 3), hence y- intercept = - 3

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50