book Maths Puzzle Numerical Ability

study time/ test score
15 60
21 68
28 66
33 73
38 77
40 74
43 80
46 95
*how do i construct a scatt

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book Other Question

what is the slope of the graph of this linear equation in two variables

3y + 18x = 21
Ms. Jordan has been given a loan of $2500 for 1 year. If
the interest charged is $275, what is the interest rate on the loan?