# review graphing linear equations.pdf - review graphing...

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review, graphing linear equationsP. 133 # 1-15 odds + # 25-26P. 141-142 #1-15 odds + # 23-24-P. 133 # 1-15 odds + # 25-263. 4 ExercisesVocabulary and Core Concept Check1.WRITING. How are x-intercepts and y-intercepts alike? How are theydifferent?
The graph of the equation x = 4 is shown.5. y = -3
The graph of the equation y = -3 is shown.In exercises 7-12, find the x- and y-intercepts of the graphs of the linearequation.7. 2x + 3y = 12
To find the x-intercept of a graph, set y=0 then find the value of x byisolating itto one side of the equation. For the y-intercept, set x = 0 then find the value of y byisolating it to one side of the equation.For the x-intercept:2x + 3y = 122x + 3(0) = 12Set y to 02x + 0 = 122x = 1222Divide both sides by 2Solution: x = 6The x-intercept is (6,0).For the y-intercept:2x + 3y = 122(0) + 3y = 12Set x to 00 + 3y = 123y = 12Divide both sides by 3.33
Solution: y = 4Solution:The y-intercept is (0, 4).The x-intercept is 6 and the y-intercept is 4.X-intercept: (6, 0)Y-intercept: (0, 4)9. -4x + 8y = -16For the x-intercept:-4x + 8y = -16-4x + 8(0) = -16Set y to 0.-4x + 0 = -16-4x = -16.Divide both sides by -4.-4-4Solution: x =4The x-intercept is (4, 0).For the y-intercept:-4x + 8y = -16
-4(0) + 8y = -16Set x to 0.0 + 8y = -168y = -16Divide both sides by 8.88Solution: y = -2The y-intercept is (0, -2).Solution:X-intercept: (4, 0)y - intercept: (0, -2)The x-intercept is 4 and the y-intercept is -2.

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