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X- and Y- Intercepts. Objective: To identify the x- and y- intercepts. Standard 6.0. Return Quizzes. Any questions? 13 total points 2 extra credit points for last question. Intercepts. X-Intercept: where the line crosses the x-axis ordered pair: (x,0) - PowerPoint PPT Presentation

### Transcript of X- and Y- Intercepts

• X- and Y- InterceptsObjective: To identify the x- and y- intercepts.

Standard 6.0

• Return QuizzesAny questions?13 total points2 extra credit points for last question

• InterceptsX-Intercept: where the line crosses the x-axisordered pair: (x,0)Y-Intercept: where the line crosses the y-axisOrdered pair: (0,y)Y-interceptX-intercept

• Example 1State the x- and y- intercepts

x-intercept:y-intercept:(-4,0)(0,2)

• TOOState the x- and y- intercepts

x-intercept:y-intercept:(3,0)(0,6)

• Example 3State the x- and y- intercepts

x-intercept:y-intercept:(5,0)noneWill this vertical line ever cross the y-axis?no

• Cover up Method!If an equation is in standard form ax + by = c a,b,c are all #sCover up method:To find x-intercept, cover up the yTo find y-intercept, cover up the x

Example: 5x + 4y = 20

y-intercept: (0,5)x-intercept: (4,0)

• Examples 5 & 6 6x + 3y = -18y-intercept: (0,-6)x-intercept: (-3,0)

x 4y = 14y-intercept: (0,-7/2) x-intercept: (14,0)

• TOOWrite the x- and y- intercepts as ordered pairs 3y = 2x + 12 5x 3y = 20(0,4) (-6,0)

• Review Write an equation in point-slope(-4,3) m = 1 7(6,-2)(5,7)

• Review Write an equation in Standard Form(5,-15)(11,-3)y+5 = -4(x+1)

• Review Write an equation in Standard Form(8,-7) m = undefined(9,-2) m = 0

• HomeworkPg. 350 #19-21 a & b, 22-27Write the intercepts as an ordered pairX-intercept: (#,0)Y-intercept: (0,#)

• Monster Problem Time!!