8th Grade STAAR Math Review | TEKS 8.5(I) & 8.8(C) | Independent Practice
Name:
Date:
Period:
🖩 WRITING EQUATIONS: + → table → type points → Add regression → y = mx + b | m = MULTIPLIER (slope) | b = BONUS (y-intercept)
🖩 SOLVING EQUATIONS: ⚠️ Change x to "a"! → Type with ~ (tilde) not = → Read answer → Write x = (answer) → CHECK both sides!
📌 Verbal to Desmos Checklist
📌 Finding the Equation
Part A: Writing Equations (y = mx + b)
1 You work at a Dallas car wash earning $9/hour plus $15 for showing up.
Equation: y = x + m = b =
2 A rideshare in Dallas charges $3 base fee plus $2 per mile.
Equation: y = x +
"After 10 miles, the total cost = _______ × 10 + _______ = $_______"
3 Use Desmos to find the equation from this table.
x
y
0
5
1
8
2
11
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
m = b =
4 A State Fair game booth: $5 to play plus $3 per extra ball.
Equation: y = x +
5 Use Desmos to find the equation from this table.
x
y
1
15
3
25
( ___ , ___ ) and ( ___ , ___ )
y = ___x + ___
m = b = Full equation: y = x +
Part B: Solving Equations — Desmos Tilde Method
6 Solve: 5x + 10 = 3x + 24
Change x to: ___
Type in Desmos: _________________________
Desmos says: ___ = ___
Answer: x =
5( __ ) + 10 = ___
3( __ ) + 24 = ___
YES / NO
7 Solve: 4x + 8 = 2x + 20
Change x to: ___
Type in Desmos: _________________________
Desmos says: ___ = ___
Answer: x =
4( __ ) + 8 = ___
2( __ ) + 20 = ___
YES / NO
8 Two Dallas phone plans: Plan A costs 12x + 30 per month. Plan B costs 8x + 50. When do they cost the same?
Change x to: ___
Type in Desmos: _________________________
Desmos says: ___ = ___
Answer: x =
"Both plans cost the same at _______ months."
9 Solve: 6x + 5 = 2x + 25
Change x to: ___
Type in Desmos: _________________________
Desmos says: ___ = ___
Answer: x =
6( __ ) + 5 = ___
2( __ ) + 25 = ___
YES / NO
10 ⭐ CHALLENGE: You and your friend sell candy at school. You make 3x + 40 dollars and your friend makes 5x + 16 dollars. After how many days do you make the same amount?
Change x to: ___
Type in Desmos: _________________________
Desmos says: ___ = ___
Answer: x = days
"After _______ days, we both make $_______ ."
3( __ ) + 40 = ___
5( __ ) + 16 = ___
YES / NO
✅ Self-Check Before You Turn This In:
☐ Did I identify m (MULTIPLIER) and b (BONUS) for every equation in Part A?
☐ Did I change x to another letter for EVERY problem in Part B?
☐ Did I use ~ (tilde) not = in Desmos?
☐ Did I CHECK both sides for at least 3 problems?
