AlgebraEasy–MediumReciprocal of a slope from standard form
Algebra practice question
In the xy-plane, the line 2x − 4y = 8 has slope m. What is the value of 1/m?
Answer: 2
−4y = −2x + 8 gives y = x/2 − 2, so m = 1/2 and 1/m = 2.
Common wrong answers
- If you answered 4
- 4 uses m = 1/4.
- If you answered 0.5
- 0.5 is m itself.
- If you answered -2
- −2 has the sign wrong.
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.