Question 1206978

speed,{{{x}}} ({{{mil/h}}}) | mil per gallon, {{{y}}}
{{{20}}}......................|..........{{{24.9}}}
{{{30}}}......................|..........{{{28.3}}}
{{{35}}}......................|..........{{{29.1}}}
{{{40}}}......................|..........{{{30.1}}}
{{{50}}}......................|..........{{{30.0}}}
{{{60}}}......................|..........{{{29.1}}}


use quadratic regression calculator to find the parabola of best fit:


https://www.emathhelp.net/en/calculators/probability-statistics/quadratic-regression-calculator/?xs=20%2C30%2C35%2C40%2C50%2C60&ys=24.9%2C28.3%2C+29.1%2C+30.1%2C30%2C29.1%2C



{{{y=-0.00733766233766234x^2+0.688662337662338x+14.1153246753247}}}

if{{{x=65}}}

{{{y=-0.00733766233766234*65^2+0.688662337662338*65+14.1153246753247}}}

{{{y=27.8767532467532835}}}

{{{y=27.9}}}


answer: A