Why is mathjax not working?

Dale Humby bio photo By Dale Humby

To run this, launch Jekyll with

jekyll serve --drafts

Hello me!

This is a post with some things here. And: is a straight line.

where is the steepness of the curve, with larger making the curve steeper.

And for : If then and if then and if then

The weightings that I chose were:

Visualising this using $ax^2 + bx + c$ for a nice parabola.

${cost}$ Probability of sending SMS ($P_{cost}$)
0 0.00 1.000000
1 0.19 0.797425
2 0.21 0.744602
3 0.23 0.689356
4 0.25 0.633431
5 0.35 0.386404
6 0.40 0.296703
7 0.50 0.177632
8 0.75 0.060150
9 1.30 0.012140
10 1.74 0.005099