## SAT Question of the Day

The SAT question of the day is a Sentence Completion Question that has already been addressed on this blog: click here to see an explanation.

## ACT Question of the Day

The ACT question of the day is a math question that tests your knowledge of coordinate geometry. You must choose the graph that most accurately depicts the line *y* = 3*x* + 1. Many students will graph this on a calculator, but you should be able to select the answer in just a couple of seconds by relying on your knowledge of the equation of a line.

The equation of any line can be written as *y = mx + b.* The *m* is the slope of the line. Your slope (3) is positive, so you know that the line must also be positive; it must start out low and increase. That means that you can eliminate answer choices (D) and (E) because they are negative; they start out high and decrease.

Then look back at your equation. In *y = mx + b*, the variable *b* represents the y-intercept, where the line crosses the y-axis. Your line, *y* = 3*x* + 1, will cross the y-axis at 1. You can eliminate answer choice (A) because this line passes through the origin, (0,0). You can eliminate (B) because this line crosses the y-axis under the origin and would have a negative value for *b*. You have eliminated all but one choice.

The correct answer is (C).

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