ACT Math Test Prep For Pre-Algebra

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form is given by the equation y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated using the formula m = (y2 - y1) / (x2 - x1).

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and will never intersect.

Front

How do you calculate percent change?

Back

Percent change is calculated using the formula: ((new value - old value) / old value) * 100%.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis, represented by the value of b in the slope-intercept form.

Front

What is the formula for calculating energy consumption in joules?

Back

Energy consumption can be calculated using the formula: Energy (J) = Power (W) × Time (s).

Front

How do you convert a number in scientific notation to standard form?

Back

To convert from scientific notation to standard form, multiply the coefficient by 10 raised to the power of the exponent.

Front

What is the significance of the coefficient in front of x in the slope-intercept form?

Back

The coefficient in front of x (m) represents the slope of the line, indicating how steep the line is.

Front

What is the formula for finding the total energy consumption of multiple devices?

Back

Total energy consumption = Sum of energy consumption of each device.

Front

How do you determine if a line is increasing or decreasing based on its slope?

Back

If the slope (m) is positive, the line is increasing; if the slope is negative, the line is decreasing.