Unit 6 Review

A baseball coach graphs some data and finds the line of best fit. The equation for the line of best fit is y = 0.32x – 20.51, where x is the number of times at bat and y is the number of hits.

How many hits should he expect from a player who is at bat 175 times?

• 35 hits

• 609 hits

• 42 hits

• 69 hits

Jared collected data on the ages and heights of a random sample of elementary school students. If he plots the data on a scatter plot, what relationship will he most likely see between age and height?

• A negative correlation

• No correlation

• A positive correlation

• A constant correlation

Slope intercept form looks like:

• y = mx + k

• y = mx + b

• x = my + b

• y = bx + m

m stands for the ...

• y-intercept

• x-intercept

• initial value

• slope

b stands for the ...

• y-intercept

• x-intercept

• slope

write the equation of the line in slope-intercept form

m = 6, b = -2

• y = 6x + 2

• y= -2x + 6

• y = 6x - 2

• x = 6y - 2

Chang wants to know if he is improving his skill on the cello. He created a scatter plot and drew a line of best fit.

If he uses the point (2, 8) and (5, 1.5) from his line, which equation would best represent the line of best fit?

• y = -2.17x + 12.3

• y = 2.17x + 3.77

• y = -0.46x + 9

• y = -2.17x - 9.35

Write the equation of the line in Slope Intercept form

(-1,6) ; m = 5

• y = -x + 5

• y = 5x + 11

• y = 6x - 1

• y = 5x + 6

Write the equation of the line that passes through the given points in slope intercept form

(-2,-2) and (4,10)

• y = 2x + 2

• y = -2x + 10

• y = 4x - 2

• y = -2x - 2

The slope in this scenario is... and means....

• $0; how much 0 gallons of gas costs

• $3.75; the cost of gas per gallon

• $15; the cost of gas

• 4 gallons; the number of gallons