Algebra 2 - 2.2, 2.4, 2.7 Problems

The cost of producing 4 units is $204.80. The cost of producing 8 units is $209.60. How much does it cost to produce 12 units?

$214.4

For the function find f(-2), f(3), f(7) ; f(x)=5x+2

(-2,-8) (3,17) (7,37)

Find the slope ; (2,3) (-5,-9)

12/7

Suppose f(x)=-3x+2 and g(x)=1/2x-1 ; g(-2)/f(3)

2/7

After 5 months the number of subscribers to a newspaper was 5730. After 7 months the number of subscribers to the newspaper was 6022. How many subscribers to the newspaper will there be after 10 months?

6460

Is the set a function or relation? {(1,-2) (2,3/4) (3, 3+1/2) (5,9)}

Function

When graphing two-variable inequalities when you have a SOLID line what does it mean?

Less than or equal to, or greater than or equal to.

When graphing two-variable inequalities when you have a DOTTED line what does it mean?

Less than or greater than.

Is the set a function or relation? {(-3,5) (0,-2) (0,4) (1,-2)}

Relation

Is the set a function or relation? {(0.5, -1) (0.5,0) (0.5,1) (0.5,3)}

Relation

Write an equation for the line - through (-3,4) and vertical

Vertical line - x=-3 (slope=undefined) ; Horizontal line - y=4 (slope=0)

Find the slope and intercepts of the line - f(x)=4/5x+7

x intercept = -35/4, 0 ; y intercept = 0,7

Write an equation in point-slope form - (1/2 , 2/3) and (-3/2 , 5/3)

y-2/3=-1/2(x-1/2)

Solve for y, slope (m), and y-intercept (b) ; 8x-2y=9

y=4x-3 ; m=4 ; b=-3

For the function find f(-2), f(3), f(7), f(-1/2) ; f(x)=-3x+1.8

((-2,7.8) (3,-7.2) (7, -19.2) (-1/2, 3.3)

For the function find f(-2), f(3), f(7) ; f(x)=-1/3x+1

(-2, 5/3) (3,0) (7, -4/3)

Write an equation in standard form - slope=2/5 ; (-1,3)

y-2/5x=3.4

Write an equation for the line - through (-1,3) and parallel to y=2x+1

y=2x+5