Question

14. (01.04)

On the graph of the equation 3x + 2y = 18, what is the value of the y-intercept?
-9
-6
6
9

Answer 1

9

Explanation:

In slope-intercept form of linear equation y = mx + b , value of "b" is y-intercept.

Let solve 3x + 2y = 18 for "y"

2y = - 3x + 18

y =
`-(3)/(2)` x + 9 ⇒ 9 is y-intercept.

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There is another way to solve this kind of problems:

Coordinates of y-intercept are (0, y) .

3(0) + 2y = 18

2y = 18

y = 9

(0, 9)

Answer 2

6

Explanation:

U divide 18 by 3.