# math

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Kevin plotted a linear equation on a graph with 18 as the y-intercept. Which of the following could be the equation plotted by Kevin?

• math -

1/2y = 9x + 5
3x = 6 - 1/3y

• math -

y-intercept is a point where the graph of a function or relation intersects with the y-axis of the coordinate system.

OR

y-intercept 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

y-intercept = 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

y-intercept = 18

3x = 6 - 1 / 3 y

• math -

That is the correct answer. How did you come up with it?

lol

:)

• math -

lit

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