Finding Equations of Linear Models

The value of a particular car model t years after its purchased is given by
V(t) = 25000-3000t
What does V(0) represent?

• Value after 1 year

• Value after 1 week

• Value after 1 month

• Purchase price of the car

What is the equation of point-slope form?

• y=mx+b

• m=y2-y1/x2-x1

• y-y1=m(x-x1)

• f(X)=mx+b

m=2 through (-1,-3)

• y-3=2(x-1)

• y+3=2(x+1)

• y-2=3(x+1)

• y+1=3(x-2)

How can we find the equation of a line using point-slope form?

• By using the y=mx+b method

• By multiplying the point on the line with the slope of the line

• By using the point on the line and the slope of the line. Then, you can use the formula y-y1=m(x-x1)

• By finding the x- and y- intercepts

m=2 through (3,4)

• y-2=3(x-4)

• y-4=2(x-3)

• y+3=4(x+3)

• y-4=2(x-3)

explain how to write an equation in point-slope form using a given point and slope.

• Point-slope is not used to write equations; it’s actually used to calculate the area of a triangle.

• write the equation as y=mx+c, where c is a constant value.

• use the formula y=mx+b, where m is the slope and b is the y-intercept.

• use a given point (x1,y1) and the slope (m) of the line. The equation is y-y1=m(x-x1)

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Based on the line of best fit, how many complaints should the company expect at the end of week 8?

• 75

• 91

• 96

• 110

The table shows the height of a tree for various years after it was planted. Using the line of best fit, how tall would the tree be 30 years after it was planted? Round your answer to the nearest whole number.

• 22 feet

• 23 feet

• 36 feet

• 37 feet