ONLY RIGHT ANSWERS. If the value of a in the quadratic function f(x) = ax 2 + bx + c is -2, the function will.
open down and have a minimum
open up and have a maximum
open down and have a maximum
open up and have a minimum

Open down and have a maximum

Step-by-step explanation:

A negative a value will reflect the curve (it's a parabola) So after getting flipped over, the curve will have a highest point(a maximum); it opens downward (the shape of an arch or the path of a tossed ball)

y= -3x+15.

Step-by-step explanation:

To solve this equation, we first need to calculate the slope of the equation:

m= m= m= -3.

Now, we can simply plug in our slope value into our line equation (y= mx+b) with one of the point listed to find our b value.

3= -3(4)+b

3= -12+b

15=b

Finally, the equation we get is:

y= -3x+15