y=10-1/2x
how do i work out the y intercept

2. Originally Posted by alysha230893
y=10-1/2x
how do i work out the y intercept
Substitute x = 0 and solve for y.

3. is there a formula i can follow

4. Yes- set x= 0 and solve for y!!! As soon as you set x= 0, you are going to have a serious problem which should tell you immediately that there is no y intercept.

5. would the answer change if it was the gradient of the y intercept

6. Originally Posted by alysha230893
y=10-1/2x
how do i work out the y intercept
I assume you mean y = 10 - (1/2)x.

The simple formula is ..... substitute x = 0 and solve for y. Do you know what (1/2)(0) is equal to ....?