The y-intercept of the graph of 12x + 2y = 18 in the xy-plane is (0, y). What is the value of y? SAT Math Test
The y-intercept of the graph of 12x + 2y = 18 in the xy-plane is (0, y). What is the value of y?
Answer
We have to solve the equation for y. To solve the linear equation of 12x + 2y = 18, we need to substitute (x, y) coordinates from a point that falls on the line.
Given:
(0, y) is a point on the line.
Therefore, x=0 and y is unknown
Let’s add this to the equation 12x + 2y = 18
12(0) + 2y = 18
0 + 2y = 18
2y = 18
Divide both sides by 2 and we get
y = 18/2
y = 9
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