ACT MATH FORMULAS QUESTIONS WITH CORRECT ANSWERS

Quadratic Formula CORRECT ANSWER Slope CORRECT ANSWER sine ratio CORRECT ANSWER cosine ratio CORRECT ANSWER tangent ratio CORRECT ANSWER Direct Variation CORRECT ANSWER y=kx Point-Slope form CORRECT ANSWER y-y₁=m(x-x₁) Standard form CORRECT ANSWER 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 CORRECT ANSWER When there is a vertical line that has different y points, but the same x point Zero CORRECT ANSWER When there is a horizontal line that has different x points, but the same y point Graphing ≥ or on a coordinate plane CORRECT ANSWER shade upwards or to the right Graphing ≤ or on a coordinate plane CORRECT ANSWER shade downwards or to the left Infinitely many solutions CORRECT ANSWER when the system of equations have the same slope and y-intercept