# Math Weekly blog post #16

That week we did equations of lines and solving equation of graphs.

there is 3 kinds of equations of lines.

to find the slope the equations is y1-y2 divided by x1-x2

the first one is called the slope-y intercept equation which is y=mx+b. To solve for this one you have to obtain the slope which is your M and at least your y coordinate which is your B.

the second one is called general form which is Ax+By+C=0. The A has to be bigger than 0 and all has to be integers for this to work, also it has to equal always to 0. To do this you can just do the slope-y intercept equation and trasfer the Y to the other side and your done.

the most efficient one is the slope-point form which is m(x1-x2)=y1-y2. To solve this one you need the slope and 2 sets of coordinates a and you have you’re equation in just seconds.

this is the slope-point form equation turned to general form.

i only needed one set coordinate and a slope and turned it into general form and that’s what I learned this week.

# Math Weekly blog post #14

That week we learned how to interpret graphs of functions and to do distance formula.

interpretting graphs is explaining what is happening in the graph by how and what the slope looks like. When it is a flat line it is a constant rate, if it is going up your increasing and going down is decreasing.

for example

,

When I was walking home, I walked at a constant rate, then slowed down and and walked at that rate, then started walking again at a faster rate for a short while then walked at a constant rate till I slowed down to stopped at my doorstep.

this is how you interpret a graph function and how to do it.