What is the vertex of the graph of y = x2 + 4x? (–2, –12) (–2, –8) (–2, –6) (–2, –4)

The vertex is (-2,-4)

Step-by-step explanation:

If we have an equation as:

Where a is the constant beside , b is the constant beside and c is the constant that is alone. The vertex of the graph describe by this equation is the point (x,y), where x is calculate as:

And y is the founded replacing the value of x on the initial equation.

In this case, we have the equation

So, a is equal to 1, b is equal to 4 and c is equal to 0. Replacing this values for found the vertex, we get:

Them, the value of y is founded replacing -2 on the initial equation as:

Therefore, the vertex of the graph describe by the equation is the point (-2,-4)

36

step-by-step explanation:

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.