Linear Modeling Using Slope Intercept Form

What does the "b" stand for in y=mx+b?

• slope

• x-intercept

• y-intercept

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CCSS.8.F.A.3

CCSS.8.EE.B.6

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CCSS.8.F.A.3

CCSS.8.EE.B.6

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CCSS.8.F.A.3

CCSS.8.EE.B.6

Dominoes charges $6 per pizza. The delivery fee is $4. Write an equation to model this situation.

• y = -4x+6

• y = 6x+4

• y = 1/6x-4

• y = 64x

Staples charges $4 per pack of pens. They also charge a $7 shipping fee. Write an equation to model this situation.

• y = 4x+7

• y = 4x-7

• y = 7x-4

• y = 28x

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A 7-inch candle burns at a rate of 2-inches per hour. Which equation represents the relationship between y, the height of the candle in inches, as a function of x, the number of hours the candle burns?

• y=2x+7

• y=-2x+7

• y=2-7x

• y=7x+2

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

y= 80x + 125 models the amount of money (y) in the register after selling x tickets. How much money does she have in the register before selling any tickets?

• $125

• $80

• $205

• $45

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CCSS.HSF.LE.B.5

The slope of a line is 5 and passes through the point (2, -3).

If you are trying to find the y-intercept, what variable will be replaced with the number 2 in y = mx + b ?

• x

• y

• m

• b

Write the equation of the line that passes through the point (1, -1) and has a slope of -4.

• y = -4x + 3

• y = -4x - 3

• y = -4x + 5

• y = -4x - 5

Write an equation in slope-intercept form from the points (-4, 0) and (1, 5)

• y = x - 4

• y = x + 4

• x = y + 4

• y = 4x + 4