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The formula for a straight line equation is y = mx + b, where m is the slope and b is the y-intercept.
To find the slope of a straight line, you can use the equation m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line. Alternatively, you can use the slope formula, m = rise / run, where rise is the change in y and run is the change in x between two points on the line.
The y-intercept represents the point where the line crosses the y-axis. In other words, it is the value of y when x is equal to 0. It is also known as the initial value or starting point of the line.
Yes, a straight line equation can have a negative slope. This means that the line is decreasing from left to right. The slope represents the rate of change of the line, so a negative slope indicates that the line is decreasing.
To graph a straight line using its equation, you can plot the y-intercept first. Then, use the slope to find a second point on the line and plot it. Finally, draw a line through the two points to create the graph of the line.
