If y is proportional to the square and = 6675 when Y of When c = 12 x = 15, find y when x = 12

y
=
k
×
1
x
=
k
x
to find k use the given condition

y
=
15
when
x
=
5
y
=
k
x
⇒
k
=
y
x
=
15
×
5
=
75
equation is
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
∣
2
2
y
=
75
x
2
2
∣
∣
∣
−−−−−−−−−−−−
when
x
=
25
then
y
=
75
25
=
3

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.