exam Maths Puzzle Numerical Ability

Find an equation in slope-intercept form passing through the points (2,5) and (7,-3)

Any help will be appreciated.

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exam Other Question

John currently has enough money to buy 50 toy cars. If the cost of each car was 10 cents less, John could buy 5 more cars. How much money does John have to spend on the toy cars?

a. $40
b. $45
c. $55
d. $75 Please can someone help me with this problem: If f(4)= 0 and f(6)= 6, which of the following could represent f(x)? I do not know where to begin with this problem it is confusing. Can someone help me?