5.2 Writing the Equation of a Line Using slope intercept form

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# 5.2 Writing the Equation of a Line Using slope intercept form - PowerPoint PPT Presentation

5.2 Writing the Equation of a Line Using slope intercept form. Review of Slope-Intercept Form. Name the slope and y-intercept of each equation :. y = -4 x + 3 y = 5 – x 8 x + y = 4 x - 2 y =10 y = x y = 5. m = -4, b =3 m = - , b = 5

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Presentation Transcript
Review of Slope-Intercept Form

Name the slope and y-intercept of each equation:

y = -4x + 3

y = 5 – x

8x + y =

4x - 2y =10

y = x

y = 5

m = -4, b =3

m = - , b = 5

Rewrite as y = -8x , m = -8, b =

Rewrite as y = 2x - 5, m = 2, b = -5

Rewrite as y = x + 0, m = , b = 0

Rewrite as y = 0x + 5, m = 0, b = 5

-2

+1

x

y

Example 2
• b = 1
• m =
• y = x + 1

x

y

Example 3
• b = 4
• m = 0/1= 0
• y = 0x + 4, y = 4
Word Problems with slope-Int
• A carnival charges \$2.50 per ride after an entrance fee. You paid a total of \$22.50 after 6 rides. Write an equation that gives the total cost as a function of the number of rides. Find the total cost for 15 yards.
Another word problem
• A BMX race track charges a membership fee and an entry fee per race. One racer paid a total of \$76 after 3 races. Another racer paid a total of \$124 after 7 races.
• How much does the track membership cost?
• What is the entry fee per race?
• Write an equation that gives the total cost as a function of the number of races entered.