Question

Find the x and y intercept of this equation:

10x-70y=210

I keep getting the wrong answer. Can you show me how to set it up and work it out?

Answer 1

Y- intercept is when x is equal to 0
To find it replace x with 0

10(0)-70y=210
Now solve for y

0-70y=210
-70y=210
y=-3

X- intercept is when y is equal to 0
To find it replace y with 0

10x-70(0)=210
10x-0=210
10x=210
X=21

So the y-intercept is at (0,-3)
And x intercept is at (21,0)