Answer:
Explanation:
The general formula is y=mx+b
Calculate the slope, m.
m=(y2-y1)/(x2-x1)
m=(3-5)/(1-2)
m=(-2)/(-1)=2
The slope is 2.
So plug that into the equation y=mx+b
y=2x+b.
Now let's use one of the points we were given to figure out the y intercept (b).
y=2x+b, plug in (1,3)
3=2(1)+b
3=2+b
1=b
So the intercept is 1.
Now we know the equation is y=2x+1.
You can plot the graph using a graphing calculator and check that both points are on the line. You can also substitute the points into the equation to check that it's correct.