The price of an item yesterday was $180 today the price fell to $99 find the percentage decrease
2 answers:
Answer:
55%
Step-by-step explanation:
to find percentages:
I
pretend this is a box
basically just fill this in and it will give you what you want. For example, here, you have the original and part of the original so it will look like this:
I
then you multiply across and divide top to bottom (doesn't matter in which order), so:
=0.55 · 100 = 55%.
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First find out the function for the given table.
Find the slope.
m= (y2-y1)/(x2-x1)
m=(-1-(-3)) / (-1-(-2))
m=(-1+3) / (-1+2)
m=2/1
m=2
Now equation of line:
y-y1=m(x-x1)
y-(-3)=2(x-(-2))
y+3=2(x+2)
y+3=2x+4
y=2x+1
Now plot these points on the graph, we get the attached graph.
Find the slope.
m= (y2-y1)/(x2-x1)
m=(-1-(-3)) / (-1-(-2))
m=(-1+3) / (-1+2)
m=2/1
m=2
Now equation of line:
y-y1=m(x-x1)
y-(-3)=2(x-(-2))
y+3=2(x+2)
y+3=2x+4
y=2x+1
Now plot these points on the graph, we get the attached graph.