8th Grade STAAR Math Review | TEKS 8.4(B) & 8.4(C) | Independent Practice
Name:
Date:
Period:
🖩 DESMOS STEPS: Pick 2 points → Press + → Click "table" → Type points → Click "Add regression" → Read equation: m = MULTIPLIER (number touching x = slope) | b = BONUS (number by itself = y-intercept)
📌 REFERENCE CHEAT SHEET — Use this while you work!
1 A food truck near Fair Park charges a set price per taco.
Tacos (x)
Cost (y)
1
$3
2
$6
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = y-intercept (b) = Unit rate = $ per taco
2 DART bus rides cost a set price per ride.
Rides (x)
Cost (y)
1
$1.75
2
$3.50
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = Unit rate = $ per ride
3 Jaylen walks on the Katy Trail. His data is below.
Hours (x)
Miles (y)
2
5
4
10
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) =
"The slope means Jaylen walks _______ miles per _______."
4 Dallas Mavericks t-shirts sell at a set price each.
Shirts (x)
Cost (y)
1
$15
3
$45
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = Unit rate = $ per shirt
5 A parking garage in Downtown Dallas charges per hour.
Hours (x)
Cost (y)
1
$8
3
$24
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = Unit rate = $ per hour
"The slope means parking costs $_______ per _______."
6 Elotes at the State Fair of Texas:
Cups (x)
Cost (y)
2
$7.00
5
$17.50
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = y-intercept (b) =
Is this proportional (does b = 0)? Circle: YES / NO
7 State Fair turkey legs sell at a set price. Pick ANY 2 points to use in Desmos.
Legs (x)
Cost (y)
1
$12
2
$24
4
$48
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = Does it matter which 2 points you pick? Circle: YES / NO
8 A Dallas food delivery app charges a base fee plus a per-mile rate.
Miles (x)
Cost (y)
0
$5
2
$11
4
$17
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = y-intercept (b) =
"The slope means delivery costs $_______ per _______. The y-intercept means the base fee is $_______."
9 A DART monthly pass costs a set price per month.
Months (x)
Cost (y)
1
$48
3
$144
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) =
"The slope means the DART pass costs $_______ per _______."
10 ⭐ CHALLENGE: A Dallas tutoring company charges per session plus a signup fee.
Sessions (x)
Total Cost (y)
1
$35
3
$75
5
$115
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
Slope (m) = y-intercept (b) =
"The slope means each session costs $_______. The y-intercept means the signup fee is $_______."
Full equation: y = x +
✅ Self-Check Before You Turn This In:
☐ Did I use + → table → Add regression for every problem?
☐ Did I identify m (MULTIPLIER = slope) and b (BONUS = y-intercept) in each equation?
☐ Did I write what the slope means when asked?
