Linear Equations.

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Objective - To graph linear equations using the slope and y-intercept.

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Presentation transcript:

Linear Equations

y –y1 = m(x – x1) Find and label y = mx + b y – intercept form slope Point -Slope Form Given: (x,y) and m y - coordinate slope x - coordinate

Find and lable y = mx + b y –y1 = m(x – x1)

(x1 , y1 ) and (x2 , y2 )

Jessie’s bus ride to school is five minutes more than 2/3 the time of Robert’s bus ride. Which graph shows the possible times of Jessie’s and Robert’s bus rides?

Jessie’s bus ride to school is five minutes more than 2/3 the time of Robert’s bus ride. Which graph shows the possible times of Jessie’s and Robert’s bus rides?

Suppose that the function f(x) = 2x + 12 represents the cost to rent x movies a month from an internet movie club. Makayla now has $10. How many more dollars does Makayla need to rent 7 movies next month?

f(7) = 2(7) + 12 $26 - $10 = $16 f(7) = 14 + 12 f(7) = 26 Suppose that the function f(x) = 2x + 12 represents the cost to rent x movies a month from an internet movie club. Makayla now has $10. How many more dollars does Makayla need to rent 7 movies next month?

10x + 5 = 7.5x + 25 2.5x = 20 x = 8

y – y1 = m(x – x1 ) y - 12 = 1.5(x – 1) y = 1.5(x -1) + 12 OR y = 12 + 1.5(x – 1)