Yea im back more help needed
Write an equation of the line shown in each graph, please explain how to do this one and i can understand the rest sorry its sideways i took the pic with my phone
You're looking for a line with the formula y= mx+ b , in which m= slope and b= y intercept.
First, use the slope formula with your two points to find the slope.
That is "m."
Next, plug one of your points, such as (-5,0) into the equation.
0= -5m + b
You should have m already from the slope formula. You then solve for b.
Finally, you put it all together.
y= mx+ b
Alternately, to find b you can use the formula y1-y= m(x-x1), called the point-slope formula.
Your two points are and .
You are looking for the equation of the line, i.e. where m is the slope and c is the y-intercept.
We're given the y-intercept. It's 2.
So we just need the slope.
Here, .
So using the slope of a line formula
.
So the equation of the line is
, or if you want to clean it up...
.