What is the y value of the y-intercept for the graph of the equation
-4x+5y=9?
Is it 9/5.
Yes.
1. To find the x value of the x-intercept, substitute 0 for the other lettsr,
y, and solve for x. That will be the x value of the x intercept.
2. To find the y value of the y-intercept, substitute 0 for the other lettsr,
x, and solve for y. That will be the y value of the y intercept.
You only asked for the y value of the y intercept, so we substitute (0) for
the other letter, x,
-4x + 5y = 9
-4(0) + 5y = 9
0 + 5y = 9
5y = 9
y = 9/5
So you are right. The y-intercept is the point (0, 9/5)
To find the x value of the x intercept, we substitute
(0) for the other letter, y,
-4x + 5y = 9
-4x + 5(0) = 9
-4x + 0 = 9
-4x = 9
x = -9/4
The x-intercept is the point (-9/4, 0)
Edwin
