This week, we learnt about the point slope form of a line. We’ve already learnt about slope y-intercept form, and this is just another form to show a line numerically.

For a point slope form of a line, the default equation you want to follow is y-_=m(x-_0).

First of all, we already know how to calculate m, the slope. We can quickly fill that in as m=4/1, or m=4.

y-_=4(x-_0)

But what are the 2 mystery numbers? These numbers are the values of the selected point. In our case, our point is (2,3). Converting that into point slope form is extremely simple. All you have to do is put the x value in the coordinate on the right side of the equation, and the y value on the left side of the equation.

y-3=4(x-2)

 

Warning:

Make sure if one of the coordinate values are negative you put it in brackets. Otherwhise, you may get confused having 2 negative symbols beside each other.