SAT Math

If solve for X is asked use what

DESMOS

Which is the variable/vary in this equation y=mx+b

y

x

Which is the constants/don't change in this equation y=mx+b

m

b

which is the coefficient/# that multiplies variable in this equation 3x+8

3

which is the variable in this equation 3x+8

x

No solution (same slope)

||

Infinite solution

/

Solution (negative reciprocal slopes) ex. slope /2 other slope /(-1/2)

X-

Label X is half of 50

is - = / of - *

exponent product rule / x^a * X^b

= X^a+b

exponent quotient rule / x^a/x^b

= x^a*b

exponent power rule / (x^a)^b

= x^a*b

fractional exponents / x^1/a

= a√x

Negative exponent / x^-a

= 1/x^a

Zero power / x^0

= 1

Mean

Sum of all values in set divided by number of values in data set

Median

Middle # in set

Range

Max - Min

Integers

Positive or Negative whole #s

Sin

O/H

Cos

A/H

Tan

O/A

Linear

y=mx+b

20% of x

.02x

Increasing x by 20%

1.2x

Decreasing x by 20%

0.8x

Density

Mass/Volume

For Quadratics use what

DESMOS

Standard deviation

measures spread of data

altitude of triangle

goes from right angle to hypotenus

Line of tang-ency

line outside edge of circle

Inscribed angle

point/ angle on perimeter of circle

radians to degrees

D= r * 180/pie

degrees to radians

r = d * pie/180

congruent triangles

copies same triangle

similar triangles

same triangle just scaled up or down

1) angles are same

2) sides are proportional

3) sin cos tan are same

Vertex formula

a(x-h)²+k