# SAT Math Multiple Choice Question 781: Answer and Explanation

Home > SAT Test > SAT Math Multiple Choice Practice Tests

### Test Information

- Use your browser's back button to return to your test results.
- Do more SAT Math Multiple Choice Practice Tests.

**Question: 781**

**1.**

Which of the following equations represents the line shown in the graph?

- A.
- B.
- C.
- D.

**Correct Answer:** B

**Explanation:**

**B**

**Difficulty:** Easy

**Category:** Heart of Algebra / Linear Equations

**Strategic Advice:** When asked to match a graph to an equation, always start by examining the answer choices. Here, the equations are written in slope-intercept form ( ), so find the slope of the line and its *y*-intercept and match them to *m* and *b* in the correct equation.

**Getting to the Answer:** The line crosses the vertical axis at (0, 6), making the *y*-intercept of the line 6, which means you can immediately eliminate A and D. To find the slope of the line, you can count the rise and the run from the *y*-intercept to the next point that lands on the intersection of two grid-lines, (4, 7), or you can use the slope formula. Either way, you'll find that the slope is, which makes (B) the correct answer.