Math ACT 2026
Slope Formula - CORRECT ANSWER-m = (y2 -
y1) / (x2 - x1)
Slope-Intercept Form - CORRECT ANSWER-y =
mx + b (where m is slope and b is y-intercept)
Midpoint Formula - CORRECT ANSWER-((x1 +
x2)/2, (y1 + y2)/2) --- The average of the x's and
y's.
Distance Formula - CORRECT ANSWER-Square
root of [(x2 - x1)^2 + (y2 - y1)^2] --- Based on
Pythagorean Theorem.
Quadratic Formula - CORRECT ANSWER-x = [-b
± sqrt(b^2 - 4ac)] / 2a
FOIL Method - CORRECT ANSWER-First, Outer,
Inner, Last (Used to multiply two binomials).
, Factoring Difference of Squares - CORRECT
ANSWER-a^2 - b^2 = (a - b)(a + b)
Systems of Equations (Substitution) - CORRECT
ANSWER-Solve for one variable, then plug it into
the other equation.
Systems of Equations (Elimination) - CORRECT
ANSWER-Add or subtract equations to cancel out
one variable.
Function Notation f(x) - CORRECT ANSWER-Just
a fancy name for "y." f(3) means "plug in 3 for x."
Domain - CORRECT ANSWER-All possible x-
values (input).
Range - CORRECT ANSWER-All possible y-
values (output).
Composite Functions f(g(x)) - CORRECT
ANSWER-Work from the inside out: plug x into g,
then plug that result into f.
Slope Formula - CORRECT ANSWER-m = (y2 -
y1) / (x2 - x1)
Slope-Intercept Form - CORRECT ANSWER-y =
mx + b (where m is slope and b is y-intercept)
Midpoint Formula - CORRECT ANSWER-((x1 +
x2)/2, (y1 + y2)/2) --- The average of the x's and
y's.
Distance Formula - CORRECT ANSWER-Square
root of [(x2 - x1)^2 + (y2 - y1)^2] --- Based on
Pythagorean Theorem.
Quadratic Formula - CORRECT ANSWER-x = [-b
± sqrt(b^2 - 4ac)] / 2a
FOIL Method - CORRECT ANSWER-First, Outer,
Inner, Last (Used to multiply two binomials).
, Factoring Difference of Squares - CORRECT
ANSWER-a^2 - b^2 = (a - b)(a + b)
Systems of Equations (Substitution) - CORRECT
ANSWER-Solve for one variable, then plug it into
the other equation.
Systems of Equations (Elimination) - CORRECT
ANSWER-Add or subtract equations to cancel out
one variable.
Function Notation f(x) - CORRECT ANSWER-Just
a fancy name for "y." f(3) means "plug in 3 for x."
Domain - CORRECT ANSWER-All possible x-
values (input).
Range - CORRECT ANSWER-All possible y-
values (output).
Composite Functions f(g(x)) - CORRECT
ANSWER-Work from the inside out: plug x into g,
then plug that result into f.
