Write the equation of the parabola passing through the points (-1,19), (2,1) and (5,9). what is the value of “a”? (the equation of the parabola in standard form is > y=ax^2 + bx + c <)

a.-9
b.8
c.2
d.9

histogram or dot plot?

step-by-step explanation:

3/6   and 9/18

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )