ACT Math Exam Formulas 2026. Exam Questions and Correct Answers With
100% Correct Answers | Latest 2026 |
Quadratic Formula - -b±[√b²-4ac]/2a
Slope - (y₂-y₁)/(x₂-x₁)
Slope-Intercept - y=mx+b
a³-b³ - (a-b)(a²+ab+b²)
a³+b³ - (a+b)(a²-ab+b²)
a²-b² - (a-b)(a+b)
a²-2ab+b² - (a-b)²
a²+2ab+b² - (a+b)²
(a+b)(c+d) - ac+ad+bc+bd
a(b+c) - ab+ac
sine ratio - opposite ÷ hypotenuse
cosine ratio - adjacent ÷ hypotenuse
, tangent ratio - opposite ÷ adjacent
A function is ___________ a relation - always
Direct Variation - y=kx
Inverse Variation - y=k/x
Slope intercept form - y=mx+b
Point-Slope form - y-y₁=m(x-x₁)
Standard form - Ax + By=C, where A, B, and C are not decimals or fractions, where A and
B are not both zero, and where A is not a negative
Undefined - When there is a vertical line that has different y points, but the same x point
Zero - When there is a horizontal line that has different x points, but the same y point
Dividing by a negative number in an inequality - You must flip the sign
Graphing < or > on a coordinate plane - dotted line
Graphing ≥ or ≤ on a coordinate plane - solid line
Graphing ≥ or > on a coordinate plane - shade upwards or to the right
100% Correct Answers | Latest 2026 |
Quadratic Formula - -b±[√b²-4ac]/2a
Slope - (y₂-y₁)/(x₂-x₁)
Slope-Intercept - y=mx+b
a³-b³ - (a-b)(a²+ab+b²)
a³+b³ - (a+b)(a²-ab+b²)
a²-b² - (a-b)(a+b)
a²-2ab+b² - (a-b)²
a²+2ab+b² - (a+b)²
(a+b)(c+d) - ac+ad+bc+bd
a(b+c) - ab+ac
sine ratio - opposite ÷ hypotenuse
cosine ratio - adjacent ÷ hypotenuse
, tangent ratio - opposite ÷ adjacent
A function is ___________ a relation - always
Direct Variation - y=kx
Inverse Variation - y=k/x
Slope intercept form - y=mx+b
Point-Slope form - y-y₁=m(x-x₁)
Standard form - Ax + By=C, where A, B, and C are not decimals or fractions, where A and
B are not both zero, and where A is not a negative
Undefined - When there is a vertical line that has different y points, but the same x point
Zero - When there is a horizontal line that has different x points, but the same y point
Dividing by a negative number in an inequality - You must flip the sign
Graphing < or > on a coordinate plane - dotted line
Graphing ≥ or ≤ on a coordinate plane - solid line
Graphing ≥ or > on a coordinate plane - shade upwards or to the right
