Answer:
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Step-by-step explanation:
One way to find the y int is to sub in 0 for x and solve for y
-3x + 9y = -54
-3(0) + 9y = -54
9y = -54
y = -54/9
y = -6....so ur y int is -6 or (0,-6)
Answer: See the graph attached.
Step-by-step explanation:
The standard form of a quadratic function is:

Where (h,k) is the vertex of the parabola.
If
is negative, then the parabola opens down.
Then, for the function:

You can identify:

Then the vertex of the parabola is at (2,4)
Note that
, therefore the parabola opens down.
Find the intersection with the x-axis. Substitute
and solve for x:

Knowing that the vertex is at (2,4), the parabola opens down and it intersects the x-axis at x=0 and x=4, you can graph the function, as you observe in the figure attached.
Answer:
Step-by-step explanation: