Test 2 Section 3 #7

How do you do Test 2 Section 3 Number 18?

Practice test 2, section 3 Q10, the answer is C (which you can easily obtain by plugging in x = 0) but is there another way to do or it some other logic you can use?

Thank you!

What’s the fastest way to do question 9 from practise test 2 section 3?

Thanks!

Hi Mike! For practise test 2, section 3 Q6, how exactly could I use backsolving to solve this? Lets say I start with C and I plug in 8. My gradient of line l is 2/5. If I plug in p as 8, I’m getting gradient of line k as 4/8. Do I now compare the fractions? How do I know if I should try plugging in a bigger or smaller number to get closer towards 2/5 (initial gradient)?

Thanks!

For the official practise test 2, section 3, question 4 is listed as a “plugging in” question.

So when I tried it out, I substituted 1 for both variables a and b. That easily allows me to pick option A.

However, one of your rules was to never plug in the values 0 and 1, yet 1 was a viable option for this question.

So how can I know when plugging in 1 will be okay and when it’s a bad idea? Also, is my method correct for this question or would you suggest another way? Thanks so much!

Can you do Test 2 Section 3 #14? Thanks!

Test 2 Section 3 Number 20 please!

T2 Sec3 #16

t2 sec 3 #17

T2 Sec 3 #15

Would you please explain problem #13 on p.486, Test 2, in the new SAT book.