Y=2,x=30 and Y=6,x=50
Find the relationship between x and y.
Find x when y=3
3 answers
Incomplete question
if it is a linear relationship, then
y=ax+b and using the first data point
2=30a+b and the second data,
6=60a+b
subtracting the first equation from the second
4=30a
or a=2/15
then
y=2/15 x +b
2=2/15 *30 + b
b=-2
finally,
y=2/15 x -2
3=2/15 x -2
45=2x-30
2x=75
x=you do it.
y=ax+b and using the first data point
2=30a+b and the second data,
6=60a+b
subtracting the first equation from the second
4=30a
or a=2/15
then
y=2/15 x +b
2=2/15 *30 + b
b=-2
finally,
y=2/15 x -2
3=2/15 x -2
45=2x-30
2x=75
x=you do it.
So you have two ordered pairs:
(30,2) and (50,6)
slope = (6-2)/(50-30) = 4/20 = 1/5
equation:
y-2 = (1/5)(x-30)
5y - 10 = x - 30
x - 5y = 20 ----> that's your relationship
then if y = 3,
x - 15 = 20
x = 35
(30,2) and (50,6)
slope = (6-2)/(50-30) = 4/20 = 1/5
equation:
y-2 = (1/5)(x-30)
5y - 10 = x - 30
x - 5y = 20 ----> that's your relationship
then if y = 3,
x - 15 = 20
x = 35