Parallel and perpendicular lines point slope form,, need help with stuff for midterms :(!!!

Tips:

Hey, here are some things that can help:

1. Remember that parallel lines have the same slope, and perpendicular lines have opposite and reciprocal slopes (flip the fraction and change the sign).

2. When it asks you for a line passing through a specific point, using the slope for the new line, plug in for x and y and solve to get b (the y-intercept).

3. Slope-intercept: y=mx+b

Point-slope: y-y1=m(x-x1)

For point-slope form, you simply substitute a given slope and point into the equation. For example, if you are given that m=3 and the point (5,2) your point-slope equation would be: y-5=3(x-2)

If you are asked to change a point-slope equation into slope-intercept, simply solve for y. In this case, our point-slope equation would become y=3x-1.

Hope this helps!

find the discount

$30 x 0.25 = $7.50 discount of 25% off

subtract the discount  $30 - $7.50 = $22.50

The sale price of the game is $22.50.