(x,y)
to be a function
for every x, ther must be only 1 y to corespond to it
basically, x must NEVER repeat with a different y
list them
ah, we see (1,1) an d(1,-1)
also (4,2) and (4,-2)
double offense
1 repeats with 1 and -1
4 repeats with 2 and -2
not a function
domain is all x values
range is all y values
if they repeat, don't list them
domain=(0,1,4)
range=(-2,-1,0,1,2)
I'd set up a ratio problem
3/4 inch = 1 mile
----------- --------
1 3/4 inch x
3/4 x = 1 3/4
divide each side by 3/4 (also change 1 3/4 to improper)
you end up with
x = 7/4 x 4/3
x = 28/12
x = 7/3 or 2 1/3
hope this helps
Y=4x+2 because with the x at 0 and y at 2 that is the y intercept
I think rational, what's the situation
7(11)= this is because when you multiply both B.77. you get one answer