Question 1148980
Points (x,y) for time and height

(12,14.8) and (29,4.6);
What is y when x is 21 ?


{{{y-14.8=((4.6-14.8)/(29-12))(x-12)}}}


{{{y=((-10.2)/(17))(x-12)+14.8}}}

{{{y=-0.6(x-12)+14.8}}}

{{{y=-0.6x+7.2+14.8}}}

{{{highlight_green(y=-0.6x+22)}}}----------------substitute 21 for x, and evaluate.