Question

The equation and graph of the polynomial is shown below. The graph reaches its minimum when the value of x is -4. What is the y-value of this minimum? I have a screenshot of the graph and formula http://prntscr.com/3qs8lr

Answer 1

I would suggest simply plugging the given x value, -4, into the given equation and solving for y. :)

Answer 2

even into the power?

Answer 3

Well, the equation is y = x^2 + 8x + 13, so wherever x features, you replace it with -4. So it would become y = (-4)^2 + 8(-4) + 13.

Answer 4

Make sense?

Answer 5

yes! thank you

Answer 6

Sure, no problem.