Can someone do it quickly since it’s a timed test Paper 2
The scatter diagram shows the scores of 10 students
in their paper 1 and paper 2 Maths GCSE exams.
1001
A line of best fit has been drawn.
90
a) What type of correlation is shown
by the graph?
80
A
70
60
paper 2
50
40
b) A pupil who scored 50 in his paper 1
exam got ill and missed paper 2.
Use the line of best fit to predict what
his paper 2 mark could have been
30
20
10
10 20 30 40 50 60 70 80 90 100
paper 1

Intersecting secant-tangent theorem states that if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.so to break it down: 1. pq acts as the tangent and ps as the secant with an intersection at p.sr = 21rp = 3x + 3pq = 4x + 4following to equation: tangent squared = the two segments multiplied by each otherso (4x + 4) ^ 2 = (3x + 3) • (21) simplifies to 16x^2 - 31x - 47 = 0 or (16x - 47)(x + 1) x = -1 or x = 47/162. pq acts as the tangent and ps as the secant with an intersection at p (again! )sr = 16rp = xpq = 15(15) ^ 2 = 16 • x225 = 16xx = 225/163. the interesting chords are proportional to each other so a ratio is possible to set up: ap dp 10 3 + x = = —— = pc pb 8 xcross multiple to get 10x = (3 + x)(8)x = 12