Algebra practice question

Answer: 5

Slope from the first two points: (10 − 4)/(3 − 1) = 3. From (3, 10) to (k, 16) the rise is 6, so the run is 2: k = 5.

Common wrong answers

If you answered 4

4 comes from a slope of 6 (using the rise without dividing by the run).

If you answered 6

6 is the rise from 10 to 16, not the run.

If you answered 7

7 adds 4 to 3 instead of 2.

More Algebra questions

• Very hard
  For what value of c does the system 3x − 2y = 8 and 9x + cy = 5 have no solution?
• Very hard
  In the system 5x + 4y = 32 and 3x − 2y = 6, what is the value of 8x + 2y?
• Very hard
  The solution set of the inequality |ax − b| ≤ 6, where a and b are constants and a > 0, is 3 ≤ x ≤ 9. What is …
• Very hard
  The function f is linear, and for every value of x, f(x + 2) − f(x) = 6. If f(5) = 4, what is the value of f(0…
• Very hard
  In the system of equations 2x + 3y = 12 and 5x − 2y = k, where k is a constant, the solution (x, y) satisfies …
• Very hard
  In the xy-plane, the system of equations kx + 6y = 12 and 2x + (k − 1)y = 6, where k is a constant, has infini…