Easy -1.2 This is a straightforward application of finding gradient from two points (m = Δy/Δx = 20/4 = 5) then substituting into y = mx + c to find the intercept. It's a routine C1 question requiring only basic coordinate geometry with no problem-solving or conceptual challenges, making it easier than average.
Question 1:
1 | y = 5x − 4 www | 3 | y−11 x−3
M2 for = oo.
−9−11 −1−3
11−(−9)
or M1 for grad = or 5 eg in y
3−(−1)
= 5x + k and M1 for y − 11 = their m(x −
3)) o.e. or subst (3, 11) or −1, −9) in
y = their mx + c or M1 for y = kx − 4 (eg
may be found by drawing) | 3
Find the equation of the line passing through $(-1, -9)$ and $(3, 11)$. Give your answer in the form $y = mx + c$. [3]
\hfill \mbox{\textit{OCR MEI C1 Q1 [3]}}