Question

HELP ME PLEASE

what are the x and y intercepts of the following line? -3x-2y=20

a) (-3/2,0), (0,-10)

b) (-20/3, 0), (0,-10)

c) (-3,2), (0,0)

d) (-3,0), (0,-2)

Answer 1

a) (-3/2,0), (0,-10)

Explanation:

y = mx + b

Change the equation to y intercept form.

-3x - 2y = 20

Isolate -2y by adding 3x on both sides.

-2y = 3x +20

Divide everything by -2

y =
`-(3)/(2)x` - 10

If you have a ti 84 plus calculator put it in the calculator:

go to y =

then press 2nd graph

then press graph

you will be at the (x,y) table

look at what (x,y) value match your choices.

Another way to solve this equation is to substitute.

a) is the correct choice