math
posted by hi on .
Kevin plotted a linear equation on a graph with 18 as the yintercept. Which of the following could be the equation plotted by Kevin?

1/2y = 9x + 5
3x = 6  1/3y 
yintercept is a point where the graph of a function or relation intersects with the yaxis of the coordinate system.
OR
yintercept is a point where x = 0
1 / 2 y = 9 x + 5 Multiply both sides by 2
y = 18 x + 10
for x = 0
y = 18 * 0 + 10 = 0 + 10 = 10
yintercept = 10
3 x = 6  1 / 3 y Multiply both sides by 3
9 x = 18  y Add y to both sides
9 x + y = 18  y + y
9 x + y = 18 Subtract 9 x to both sides
9 x + y  9 x = 18  9 x
y =  9 x + 18
for x = 0
y =  9 * 0 + 18 = 0 + 18 = 18
yintercept = 18
Answer:
3x = 6  1 / 3 y 
That is the correct answer. How did you come up with it?
lol
:) 
lit