Question

the question is "y= -2x + 1" and it needs to be graphed. Do I divied -2x by -2? Also does that make the y intercept 1? Im just checking my answer :)

Answer 1

the x intercept is certainly 1, because \((0,1)\) is on the graph

Answer 2

and no, you do not divide by anything
pick an x, find the y, plot the point
for example, if \(x=2\) then \(y=-2\times 2+1=-3\) so \((2,-3)\) is on the graph

Answer 3

so can you walk me through the problem how it should be done so I know for next time?

Answer 4

i thought i just did, but we can go slower if you like
you know the y intercept is 1, because you said it, so \((0,1)\) is on the graph

Answer 5

now the slope is \(-2\) which means for every increase of 1 in x, the y values decreases by 2

Answer 6

Oh, so do I just plot -2 on the x-axis?

Answer 7

but we can do ahead and plot a few points then connect the dots

Answer 8

no you do not

Answer 9

lets put \(x=1\) and see what \(y\) is

Answer 10

if \(x=1\) then \(y=-2\times 1+1=-2+1=-1\) so the point \((1,-1)\) is on the graph

Answer 11

maybe now pick \(x=2\) then if \(x=2\) you have
\[y=-2\times 2+1=-4+1=-3\] so now we know \((2,-3)\) is on the graph

Answer 12

once you have a few points plotted, they should line up nicely and you connect the dots to get your line

Answer 13

ok thanks :)