It first branches off into algebraic expressions and numerical expressions, under algebraic it has numbers, operations, and variables. under numerical is only has numbers and operations.<span />
Assuming the function is

the x intercepts are where the graph hits the x axis or where y=0
the y intercepts are where the graph hits the y axis or where x=0
x intercepts
set y=0 and find x


what 2 numbers multiply to get -3 and add to get -2?
-3 and 1

set to 0
0=x-3
3=x
0=x+1
-1=x
x intercepts are at x=-1 and 3 or the points (-1,0) and (3,0)
y intercepts are where x=0
set x=0



y intercept is at (0,-6)
x intercepts are at (-1,0) and (3,0)
y intercept is at (0,-6)
(0,4) is the correct answer.
H=Hours he an skate; T=total cost
T=$7.00+($1.50/hr)H
T-$7.00=($1.50/hr)H
(T-$7.00)/($1.50/hr)=H
For T=$19:
($19.00-$7.00)/($1.50/hr)=H
$12.00/($1.50/hr)=H
8hrs=H
ANSWER: Jon can skate 8 hours for $19.00.
Hope this helps!