AlgebraEasy–MediumValue of a linear function in context
Algebra practice question
A seedling is 2 centimetres tall and grows 0.75 centimetres per day. How tall, in centimetres, will it be after 8 days?
Answer: 8
2 + 0.75 × 8 = 2 + 6 = 8.
Common wrong answers
- If you answered 6
- 6 is the growth alone, without the starting height.
- If you answered 10
- 10 adds 8 to 2, treating the rate as 1 per day.
- If you answered 22
- 22 multiplies (2 + 0.75) by 8.
More Algebra questions
- Easy–Medium
A line passes through the points (0, 3) and (2, 7). What is the slope of the line? - Easy–Medium
A gym charges a $25 one-time signup fee plus $15 per month. Which equation gives the total cost C, in dollars,… - Easy–Medium
If 5(x − 2) = 3x + 4, what is the value of x? - Easy–Medium
A taxi charges a $3.50 base fare plus $2.25 per mile. If a ride costs $19.25 total, how many miles was the rid… - Easy–Medium
The equation of a line is 3x + 2y = 12. What is the y-coordinate of the point where the line crosses the y-axi… - Easy–Medium
A line in the xy-plane passes through the points (1, 5) and (4, 11). What is the y-intercept of the line?
Not affiliated with the College Board. SAT is a trademark of the College Board.