Question
X IS PARTLY CONSTANT AND PARTLY VARIES WITH Y.WHEN Y=3,X=7,AND WHEN Y=6,X=9,(A)FIND THE RELATIONSHIP BETWEEN X AND Y.(B)FIND X WHEN Y=4.
Answers
Anonymous
x = m y + b
7 = 3 m + b
9 = 6 m + b
---------------------subtract
-2 = -3 m
m = 2/3
x = (2/3)y + b
7 = 2 + b
b = 5
so
x = (2/3) y + 5
if y = 4
x = (8/3) + 15/3 = 23/3
7 = 3 m + b
9 = 6 m + b
---------------------subtract
-2 = -3 m
m = 2/3
x = (2/3)y + b
7 = 2 + b
b = 5
so
x = (2/3) y + 5
if y = 4
x = (8/3) + 15/3 = 23/3