Study on the flyISEE UpperMathematics AchievementLinear equations and graphs
Mathematics Achievement
Slope-intercept form, y equals m x plus b, is the key format for Linear equations and graphs.
Rewriting an equation into that form reveals the slope directly, though fractions or extra constants on either side must be cleared first. Intercepts come from setting x or y to zero; together with the origin they form a right triangle whose area is half the product of the intercepts.
Some questions ask which equation passes through two given points, which can be checked by substituting both points into each choice. Two different lines with the same slope are parallel and never meet, and a horizontal line has slope zero.
Pick an answer to see whether it is right — nothing is saved, and nothing needs an account.
Question 1Mid
The line crosses the -axis and the -axis, forming a right triangle with the coordinate axes. What is the area of that triangle?
Answer: C — 27
The -intercept is 6 because . The -intercept is 9 because . The triangle’s legs along the axes have lengths 6 and 9, so the area is .
Question 2Easier
Which line contains the two points and ?
Answer: A —
The slope is . Substituting gives the intercept 3, so the line is .
Question 3Mid
What is the slope of the line ?
Answer: C — 6
Subtract 4: . Multiply by 2: . The slope is 6.
Every question is picked for where you are right now, wrong answers come back until they stick, and it all works offline.
Practice 97 Linear equations and graphs questions in the app
Harder than the exam: ISEE Upper Challenge · Competition-style problems
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