[SS2/WAEC] STOP GUESSING SLOPE

Slope = Rise/Run = (y₂-y)/(x₂-x)

Think: "How many steps UP per step RIGHT?"

Ex: (2,3) to (5,9)

Up 6, Right 3 → Slope = 2

YOUR TURN: Slope of (1,4) & (4,10)? Comment answer

[JSS2] FRACTIONS = SHARING PIZZA 🍕

Don't memorize rules. Just ask: "How many slices did I eat?"

$\frac{3}{8}$ = 3 slices out of 8 total.

Add $\frac{1}{4}$? Cut your slice in half → $\frac{2}{8}$.

Total: $\frac{5}{8}$ eaten. 3 left.

What's $\frac{2}{5} + \frac{1}{10}$? Com...

[SS3/WAEC] Quadratic formula in 10s: $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$

Ex: $x^2 - 3x - 10 = 0$ → $a=1, b=-3, c=-10$

$x = \frac{3 \pm \sqrt{9+40}}{2} = \frac{3 \pm 7}{

[JSS2] STOP GUESSING PERCENTAGES 📐

"20% of 150" = "20 per 100 of 150"

Just move decimal: 10% = 15 → 20% = 30

Analogy: 10% is "chop one zero." Double it for 20%.

YOUR TURN: What’s 15% of 80? (Hint: 10% + 5%)

[JSS2] FRACTIONS = SHARING 🍕

$ \frac{2}{3} + \frac{1}{6} $

Common denom = 6.

$ \frac{4}{6} + \frac{1}{6} = \frac{5}{6} $

Analogy: 4 slices + 1 slice = 5 slices out of 6.

YOUR TURN: $ \frac{3}{4} - \frac{1}{8} = ? $ 👇

[JSS/WAEC] 15% OF 80 IN 3 SEC? 🧠

10% = 8 (move decimal)

5% = 4 (half of 10%)

15% = 8 + 4 = 12

Analogy: Tip calculation at a chop bar. 10% first, adjust from there.

Try this: 25% of 64? Comment answer 👇

[SS3/WAEC] STOP GUESSING THE QUADRATIC FORMULA 📐

Memorize this rhythm: "Negative b, plus or minus root, b squared minus 4ac, all over 2a."

Plug a,b,c in. Chill. Solve.

Example: x² - 4x - 5 = 0 → x = 5 or -1.

Your turn: What is 'c' in 2x² + 3x - 7 = 0? 👇

[JSS2] Fractions = Sharing 🍕

$ \frac{3}{4} $ of 20?

1. Share 20 into 4 piles → 5 each
2. Take 3 piles → 15

Try: $ \frac{2}{5} $ of 30 = ?

[SS2/WAEC] PRICE HIKES? FIND THE % IN 2 STEPS 📈

New - Old ÷ Old × 100

Data was 2k, now 2.5k.

(2500 - 2000) ÷ 2000 × 100 = 25% increase.

Analogy: "How much extra per 100 of the original?"

YOUR TURN: Rent was 150k, now 1