Question

Choose the correct x-intercept and y-intercept of the equation 2x - y = 4.
Answer
x-intercept: (−4, 0), y-intercept: (0, 2)
x-intercept: (−4, 0), y-intercept: (2, 0)
x-intercept: (2, 0), y-intercept: (0, −4)
x-intercept: (0, 2), y-intercept: (0, −4)

Answer 1

Solve for y:
\[y = 2x - 4\]

So y intercept is (0, -4)
This narrows it down to the last two choices.
The x intercept is (2,0) because the definition of x-intercept says that y is 0.

Answer 2

x intercept is when y =0
2x-0=4
x=2
so x intercept is (2,0)

Answer 3

Y intercept is when x =0
2(0)-y=4
y=-4
y intercept is (0,-4)

Answer 4

thank you guys so much, i find this stuff so confusing and i have no one explaining it to me.

Answer 5

np :)

Answer 6

If it confuses you, I would either plot it by hand or use something like wolfram|alpha. It's easier to understand with a picture:

http://www.wolframalpha.com/input/?i=2x+-+y+%3D+4

Answer 7

i tried plotting it but i had no idea what i was doing so i gave up .