Question

Help please! Math Nation Section 6 Test Yourself Practice Tool.

Answer 1

The vertex is (5,1125) and once that is plugged into vertex from it turns into y= (x-5)^2+1125 and that would be letter choice B

Answer 2

Answer: D)  $y=-5(x-5)^2+1125$

Step-by-step explanation:

Let x be the number of $2 increases in price and y be the revenue.

By using the given table , lets check all the options

A) $y=(x+5)^2-1125$

For x=1, y=1045

$y=(1+5)^2-1125=36-1125=-1089\\\\But\ 1045\neq-1089$

B)  $y=(x-5)^2+1125$

For x=1, y=1045

$y=(1-5)^2+1125=14+1125=1139\\\But\ 1045\neq1139$

C)   $y=-5(x+5)^2-1125$

$y=-5(1+5)^2-1125=-5(36)-1125=-1305\\\\But\ 1045\neq-1305$

D) $y=-5(x-5)^2+1125$

$y=-5(1-5)^2+1125=-5(16)+1125=1045$

Hence, this is the quadratic equation that models the data.