Answer:
k=20
Step-by-step explanation:
The constant of proportionality, k, measures the constant value of the ratio between two proportional quantities, being y and x in this case. Essentially, y/x will always equal 20, the constant of proportionality.
Answer:
the number is -11
Step-by-step explanation:
let the number be written as x
so 3-4x=47
collect like terms
-4x=47-3
-4x=44
divide both sides by -4
-4x/-4=44/-4
x=-11
What is the question though
To find the x intercepts, we need to put the standard form equation into factored form.
Which two numbers multiply to -8 and add to -2?


So the factored form is

That means the x intercepts are at 
So now we have the x intercepts.
To find the vertex, we need to convert the standard form equation into vertex form.
The formula of vertex form is 
Since the a value in the standard form equation is 1, the a value in vertex form is also one.
The h value can be found using the formula 
Which comes out to
or 1.
To find the k value, we can just plug in what we got for h back into the equation.

So the vertex is
.
This also means the axis of symmetry is 
Finally, to find the y intercept, we plug in 0 for x and solve.

So the y intercept is
.