Question

How do I find coordinate points that represent the x and y intercepts of the inear function y=-3x-5?

Answer 1

when y= 0, what does x have to be?

when x = 0 what does y have to be?

Answer 2

answers could be (-5,0) and (0,-5/3), or (-5/3,0)and (0,-5), or (-5,0)and (-5/3,0), or (-5/3,0)and (-5,0)

Answer 3

there is only one answer :)

when y = 0 the equation looks like this:

0 = -3x -5 solve for "x"


when x = 0 the equation looks like this:

y = -3(0) -5

y = 0-5

y = -5 ; so when x = 0, what does "y" equal?

Answer 4

1/5 ......? but why

Answer 5

no, wait, that can't be right. aaarrgh.

Answer 6

you write out what you are doing to solve it, and ill let you know where you are going astray..

Answer 7

I don't even know where to begin That's my problem.

Answer 8

anyone there?

Answer 9

you begin by plugging in a value of x=0 or y=0 into the equation and solving for the other variable.

Answer 10

x = 0 is usually a good be

another more simplistic manner is to get the equation into the form:

Ax + By = C

y=-3x-5 become 3x +y = -5

3(0) + y = -5 ; y = -5 (0,-5)

AND

3x + 0 = -5

3x = -5

x = -5/3...... (-5/3,0)