Negative Correlation

Negative correlation is a situation when one thing decreases and the other increases. For example,the longer you're at the mall,the less money you have would be a negative correlation.

Negative Correlation

Negative Correlation

Parallel & Perpendicular Lines

With parallel lines, the slope will be the same slope,but different  y-intercepts.

With perpendicular lines,the have reciprocal slopes. As you can see,they turned the reciprocal negative.

How to Solve an equation

Say you have two points. Let's say they're (1,8). The equation is m/slope=y2-y1

                                                                                                         x2-x1

So it would be 2-1

                     16-8

It equals 1/8

How To Find Slope Intercept

 

Problem: Find the slope intercept of the point (3,-3) and the slope is equal to 3.The formula for it is y=mx+b where m is the slope and b is the y-intercept.

1:Find the slope. In this case the slope is found for us.

2:Find your points (points already found)

3:Write it out. Substitute the things you can (y=mx+b) (-3=3(3)+b)

4: Solve. Do 3x3 which is 9. Then, it would be -3=9+b. Subtract 9 from each side (9-9 & -3-9). The 9 gets cancelled and you're just left with -3-9 which is -12. So y=3x+(-12)



How To Do 1 Step Equations.

1.Write the problem down.

2.Since you have x-9=5,look at the function being done. (subtraction,addition,multiplication,etc.) The function would be subtraction in this case.

3. Do the inverse of subtraction which is addition. Put +9 under the -9 and the 5.The nine cancels out,so you just do 5+9 which is 14. All that's left is x,so x=14.

Difference between y-intercept and x intercept

The difference between y-intercept and x-intercept is very similar. Y-intercept is the point at which a ray intercepts the y-axis. As when x-intercept is the point at which a ray intercepts the x-axis