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No credit card requiredIf 2x + 7 = 19, what is the value of x?
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Work through carefully organized SAT questions and focus on the skills that matter most. Drill by skill domain, difficulty tier, and format.
For the quadratic function f(x) = (x - 3)(x + 5), what are the coordinates of the vertex?
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Your score is more than a number.
Understand what’s improving, what’s holding you back, and what to practice next. Pinpoint exact subscore opportunities and eliminate guesswork.
Closing this specific domain gap offers an estimated +70 points in score improvement (illustrative estimate).
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SAT.ng uses your practice history to help surface the skills where more practice can make the biggest difference.
Quadratic & Nonlinear Equations
You missed 4 vertex and root transformation questions in your last two modules. Targeted practice on this specific pattern can recover up to 40 scaled points.
Calculated from 148 practice items & 3 mock tests
Every wrong answer is a lesson.
Review your mistakes with clear, step-by-step explanations so you understand the reasoning behind the answer.
In the xy-plane, a parabola has its vertex at (3, -4) and passes through the point (5, 8). Which equation represents this parabola?
State the Vertex Form of a Parabola
The vertex form of a quadratic equation is y = a(x - h)² + k, where (h, k) is the vertex coordinates.
Substitute Vertex (3, -4)
With h = 3 and k = -4, the equation becomes y = a(x - 3)² - 4. (Notice the negative sign remains inside the parentheses).
Solve for Coefficient a Using Point (5, 8)
Substitute x = 5, y = 8: 8 = a(5 - 3)² - 4 ⟹ 8 = 4a - 4 ⟹ 12 = 4a ⟹ a = 3.
Therefore, the final equation is y = 3(x - 3)² - 4.
Ready to test yourself?
Take a full-length SAT mock exam and see where you stand. Real 2-module digital test format, accurate time management, and instant diagnostic score report.
“The discovery of hydrothermal vents challenged previous biological assumptions by revealing ecosystems entirely dependent on chemosynthesis rather than solar energy...”
Prepare beyond the questions.
Digital SAT Math Formula & Concept Guide
The complete reference for algebra, advanced functions, coordinate geometry, and statistics required on the test.
Digital SAT Pacing & Time Management Strategies
Master the 2-module digital format with structured question triage and Desmos calculator shortcuts.
Digital SAT Score Concordance & Percentile Tables
Understand how raw module answers convert to the 400–1600 scaled score under adaptive scoring.
Frequently asked questions
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