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Published byCaleb Hamilton Modified over 4 years ago

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WARM UP 1. Explain how to graph a linear equation written in slope-intercept form. 2. Explain how to graph a linear equation written in point-slope form. 3. Explain how to find the y-intercept when given the slope of the line and at least one point that lies on the line and how to write the equation after finding the y-intercept. 4. Explain how to find the slope of a line when given 2 points that lie on the line. 5. Explain how to write a linear equation in point-slope form when given 2 points that lie on the line.

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WARM UP ANSWERS 1. Start with the y-intercept by plotting the value on the y-axis. Then use the slope to move to the next point to plot. Finally, draw a line through the 2 points. 2. Plot the point in the equation, then use the slope to move to the next point to plot. Finally, draw a line through the 2 points. 3. Substitute the value of the slope and the coordinates of the point into y = mx + b, then solve the equation for b. Finally, write the equation of the line by substituting in the value of the slope and y-intercept into the equation y = mx + b.

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WARM UP ANSWERS 4. First label your points , then substitute the coordinates into the slope formula, and simplify to find the slope. 5. Begin by finding the slope of the line. Next, using 1 of the 2 given points substitute the value of the slope and the coordinates of 1 of the 2 points into the point-slope form of a line The represent the coordinates of the point.

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SOLUTION STEP 1 Use intercepts to graph an equation EXAMPLE 2 Graph the equation x + 2y = 4. x + 2y = 4 x = x- intercept 4 Find the intercepts. x + 2(0)

SOLUTION STEP 1 Use intercepts to graph an equation EXAMPLE 2 Graph the equation x + 2y = 4. x + 2y = 4 x = x- intercept 4 Find the intercepts. x + 2(0)

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