SAT Tracker

Type both equations directly in standard form (e.g. 3x + 4y = 18 and 2x - y = 5). Desmos plots them immediately. Click the gray dot where the lines cross: it gives you the exact (x, y) coordinates in 2 seconds without any algebraic scratch paper work.

Instead of forward-factoring or clearing fractions, test choices directly. Type x = 5 on line 1, then on line 2 type the question equation. If the statement evaluates to true or both sides match, that is your answer. Faster than forward solving on complex rational equations.

Never use the quadratic formula by hand unless equations have irrational symbolic constants. Type y = 2x^2 - 8x + 6, and click the x-intercepts to read solutions directly. Click the curve peak or trough to read the vertex coordinates: the y-value is the maximum or minimum value!

Click the "+" button in Desmos, choose "Table", and enter your scatterplot points (x1, y1). On line 2, type y1 ~ mx1 + b (use tilde "~", not equals). Desmos instantly calculates the exact slope m, y-intercept b, and correlation coefficient r.

When a question asks: "For what value of k does the system have no solutions?", type the equations with k, click "Add slider: k", and drag the slider until lines are parallel (no intersection) or tangent. You can see the answer visually in seconds.

Eliminate arithmetic calculation fatigue. Do not multiply decimals or calculate 35% of 620 on scratch paper. Desmos evaluates raw arithmetic expressions with full order of operations in milliseconds, preventing careless mental math slips.

Type abs(2x - 5) = 9 or |2x - 5| = 9 directly. Desmos plots vertical solution lines at both roots (x = -2 and x = 7). You never need to write out the two separate positive and negative cases by hand.

Opening Desmos and typing simple 1-step arithmetic wastes 20 seconds. Save Desmos for multi-step algebra, systems, quadratic roots, vertex finders, and regression. Preserve your speed on the easy questions.

College Board intentionally inserts plural nouns right next to the verb inside prepositional phrases (e.g., "of the students", "in the ancient cities"). Cross out prepositional phrases with your mental pencil to find the true subject.

An independent clause has a subject and a verb and can stand alone as a sentence. Gluing two independent clauses together with just a comma is a Comma Splice—the #1 tested grammar trap on the SAT.

A semicolon is grammatically identical to a period. If you can't put a period there, you cannot put a semicolon. When using words like however, therefore, or furthermore between two independent clauses, the punctuation MUST be: [Clause 1]; however, [Clause 2].

Test every instance of "it's" by saying "it is" in your head. If "it is" sounds ridiculous in context, you must use "its". And remember: "its'" with the apostrophe after the s is a complete hallucination—eliminate it on sight.

All items connected by "and", "or", or commas in a series must have identical grammatical structure (all -ing verbs, all past tense, or all nouns). In comparisons, make sure you compare the same types of things (use "that of" or "those of").

When a sentence starts with an introductory modifying phrase (like an -ing or -ed phrase), ask yourself: "WHO or WHAT is actually doing this action?" That person or thing MUST be the very first noun immediately following the comma.

Cover the blank with your hand or finger. Read the sentence and find the context clues (e.g. contrast words like "despite", cause words like "because"). Predict a simple 5th-grade word that fits the blank. THEN look at the 4 choices and match your prediction. If you read the choices first, College Board's attractive distractors will bias your thinking.

Read Sentence 1 completely, then read Sentence 2. Decide which category connects them before reading choices: 1. CONTRAST: however, nevertheless, conversely, on the other hand 2. CAUSE/EFFECT: therefore, thus, consequently, as a result 3. ADDITION: furthermore, moreover, additionally 4. EXAMPLE/SPECIFICITY: for instance, specifically, to illustrate

College Board's primary punctuation trap is over-punctuation. Students love adding commas where they pause to breathe. In English, commas are only used for specific rules (lists, non-essential clauses, introductory phrases, compound sentences with FANBOYS). Never place a comma between a subject and its verb.

Check the graph title, axis labels, and legend units carefully. The correct answer choice will be 100% supported by exact data points in the chart. Trap answers often state a plausible real-world fact that simply is not measured or represented anywhere on the given graph.

Do NOT read the 5 bullet points first! Read the final prompt sentence: "The student wants to [accomplish X goal]." What is X? (e.g. "emphasize a difference between...", "introduce X to an unfamiliar audience", "explain how X works"). Look ONLY for the choice that achieves that specific goal. The trap answers are all factually true statements from the notes that fail to meet the prompt's targeted goal.