Linear functions and graphs Quiz

1. State the gradient and $y$-intercept of $y=5-2x$.

• A. Gradient $5$, intercept $-2$
• B. Gradient $-2$, intercept $5$
• C. Gradient $2$, intercept $5$
• D. Gradient $-2$, intercept $-5$

2. Find the gradient of the line through $(2,1)$ and $(6,9)$.

• A. $\frac12$
• B. $8$
• C. $4$
• D. $2$

3. Which is the equation of the line with gradient $4$ through $(0,-3)$?

• A. $y=4x-3$
• B. $y=-3x+4$
• C. $y=4x+3$
• D. $y=\frac{x}{4}-3$

4. Find the equation of the line through $(1,5)$ and $(3,9)$.

• A. $y=2x+5$
• B. $y=4x+1$
• C. $y=2x+3$
• D. $y=3x+2$

5. A candle's height is $h=20-4t$ cm after $t$ hours. What does $-4$ mean?

• A. The candle is 4 cm tall at the start
• B. The candle burns for 4 hours
• C. The candle is 4 cm tall after 1 hour
• D. The candle gets 4 cm shorter each hour