Question

Find y-intercepts of 45x^2 + 25y^2 = 16

Answer 1

what defines a y-intercept?

Answer 2

or rather, what value of x defines a y intercept?

Answer 3

when linejoining on the y axis, right?

Answer 4

good, the joining of line and y axis is a suitable definition

Answer 5

what value is x at the y-axis tho?

Answer 6

25

Answer 7

no, x does not equal 25 at the y-axis

if we take a sample of point off of the y-axis, they read:

(0,1)
(0,3)
(0,-7.8)
(0,n)

Answer 8

How do we take sample of points?

Answer 9

well, instead of taking all of the points that form the y-axis; we simply pick out a few of them to compare.